{"title":"Howie Glatter Collimation Tools","description":"\u003cp\u003eHowie Glatter collimation tools are laser collimators and accessories for aligning Newtonian and other reflecting telescopes. Single-beam lasers come in 635nm and 650nm red or 532nm green, in 1.25\", 2\" and dual 1.25\"\/2\" versions.\u003c\/p\u003e\u003cp\u003eHolographic attachments project a cross hair, concentric circles or a square grid to check focuser and secondary alignment, and the BLUG and TuBLUG add the Barlowed laser method for the primary. A variable brightness battery cap lets you dim the beam.\u003c\/p\u003e","products":[{"product_id":"howie-glatter-single-650nm-red-beam-laser-collimator-1-25-2","title":"Howie Glatter Single 650nm Red Beam Laser Collimator - 1.25\"\/2\"","description":"\u003c!-- more --\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSingle red beam operates at 650nm.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThe Howie Glatter Laser Collimator incorporates a solid state laser diode that does not fade or change with time and use.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFactory-aligned to 15 arc-seconds providing 0.1 inch accuracy at a distance of 20 feet,\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThe Howie Glatter 2\"\"\/1.25\"\" Laser Collimator is shock resistant to keep its alignment - even when dropped.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eIncludes 123A lithium battery, 1mm aperture stop, and protective case. \u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e When I started manufacturing laser collimators I realized that in order to produce consistent and accurate results they must be highly resistant to mechanical shock, so that internal laser alignment is maintained. I experimented with this aspect of collimator construction and developed a design which tremendously increased shock resistance. After aligning the laser within 15 arc seconds, I shock test each collimator by whacking it against a block of urethane plastic (urethane prevents marring), striking it at least a dozen times on three axis. I then recheck the laser alignment, and if it has not changed the collimator passes. I believe this is the most important difference setting my collimator apart from all others I know of. They will withstand a shock equivalent to dropping from eyepiece position, up the ladder on a big Dob, without alteration of laser alignment.\u003c\/p\u003e\u003cp\u003e The beam from all red diode lasers used in collimators is fuzzy-edged and elliptical in cross-section. When collimating, you sometimes must judge the location of the center of the spot by eye. To improve collimating precision, all of my collimators (except 532nm) are supplied with a removable accessory plastic aperture stop having a 1mm hole, which push-fits into the laser aperture. It produces a tiny, circular beam impact which allows more accurate alignment. With the holographic collimators, it is not used at the same time as the holographic feature, and the diffractor must be removed to install the stop. With the stop inserted the beam impact at a distance of one meter or more looks like a star diffraction pattern, with a central dot surrounded by diffraction rings. The surrounding rings can help in centering the beam very accurately. \u003cb\u003e\u003cb\u003e I offer the red holographic collimators with a choice of either 650 nanometer or 635nm wavelength. The two lasers have the same radiometric power output, but because the human eye's sensitivity to the shorter wavelength is greater, the 635nm. laser appears about two or three times brighter. The higher cost of 635nm laser diodes increases the collimator price, but it enables holographic collimation in brighter ambient light. If you intend to collimate in early twilight, it is a good choice. In darkness, however, the 650nm laser is quite adequate. Because single beam collimators concentrate all the laser light in the central beam, the 650nm laser is quite adequate for them.\"\" \u003cb\u003e\u003cb\u003e Precise... Accurate... and Durable... What more could you ask? \u003cb\u003e\u003cb\u003e Laser Collimating Instructions\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOther Info\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHolagraphic and 1mm aperture stop thread:  5\/16-56\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298269469,"sku":"SI-LC2125-650","price":434.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Single-Red-Beam-2-inch-1-25-inch-Laser-Collimator-SI-LC2125-650-1__22605.1596314048.1280.1280.jpg?v=1684340075"},{"product_id":"howie-glatter-single-532nm-green-beam-laser-collimator-1-25-2","title":"Howie Glatter Single 532nm Green Beam Laser Collimator - 1.25\"\/2\"","description":"\u003c!-- more --\u003e\u003cp\u003e This 532nm Green collimator version is much brighter than the red ones (632nm or 650nm).\u003c\/p\u003e\u003cp\u003e In most circumstances it is overly bright for night time collimation, but it is useful for Barlowed or holographic collimation in daylight or higher levels of ambient light.\u003c\/p\u003e\u003cp\u003e\u003cb\u003e Aligned to within 15 arc-seconds\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e Laser Colimating Instructions\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOther Info\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHolagraphic and 1mm aperture stop thread:  5\/16-56\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298302237,"sku":"SI-LC2125-532","price":658.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Single-GREEN-Beam-2-inch-1-25-inch-Laser-Collimator-SI-LC2125-532-1__86202.1596314048.1280.1280.jpg?v=1684340079"},{"product_id":"howie-glatter-blug-newtonian-collimator-2","title":"Howie Glatter BLUG Newtonian Collimator - 2\"","description":"\u003c!-- more --\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e\u003cspan\u003eUser Instructions\u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eIn the past, Howie Glatter made separate Barlowed collimation plugs for Feather Touch which he called the FLUG and non-Feather Touch in which he called the BLUG.  Starlight Instruments made a slight design change which now allows the same Barlowed collimation plug on both Feather Touch and Non-Feather Touch focusers.  We now call this part the Uni-Blug and now is allows astromers with multiple scopes to use the same part on their scopes.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003cspan\u003eThe Uni-Blug is used together with a regular single beam laser collimator to adjust the angular alignment of the primary mirror of a Newtonian telescope.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\"\"The Uni-Blug is the newest Newtonian collimation accessory (Blug is short for Barlowed collimation plug). The Blug is used together with a regular laser collimator in single beam mode to perform Barlowed laser Newtonian primary mirror alignment. The Blug does not attach to the collimator like my regular self-Barlow attachment. It is inserted in the inner end of the focuser drawtube, inside the tube or upper cage, and it is retained by an O-ring in the Blug base. It has a matte-white 45 degree face as a screen, and a small anti-reflection coated Barlow lens mounted in a central axial hole. \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003cspan\u003eFeathertouch focusers have a 2\"\" filter thread at the inner end of the drawtube, with a large relief diameter past the thread. In order to fit this focuser, all Uni-Blugs are supplied with an adapter o-ring which fits on the end of the Blug and acts as a \"\"spacer\"\" so that the Feathertouch focuser threads will engage the Blug retention o-ring. \u003cbr\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003cspan\u003e\u003cspan\u003eOn a truss tube dob, the 45 degree face of the Blug is easily visible from primary adjustment position. You watch the target shadow move on the Blug face as you turn the primary adjustment screws. With a solid tube scope, the Blug can be turned 180 degrees to face the front, and the target shadow will be seen easily from the front of the scope. I supply a shim kit with the Blug for use if the drawtube inner end is larger than the eyepiece nominal size. The Blug extends 3\/8\"\" into the back end of the drawtube, so the laser collimator in the eyepiece position must not extend forward far enough to interfere with the Blug, or it will not seat properly. After the secondary mirror angular alignment is adjusted with the single beam laser collimator, just insert the Blug into the back end of the drawtube, and adjust the primary mirror alignment to center the collimation target shadow on the Blug face.\"\" \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003e\u003cbr\u003e Easy... Precise... And Accurate. \u003cspan\u003e\u003c\/span\u003eWhat more could you ask?\u003c\/span\u003e\u003c\/p\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKnown To Fit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNewtonian 2\"\" Focusers\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298335005,"sku":"SI-UNI-BLUG","price":182.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-2-inch-Newtonian-Collimator-SI-UNI-BLUG-1__12706.1596314048.1280.1280.jpg?v=1684340082"},{"product_id":"howie-glatter-holographic-attachment-w-cross-hair-pattern","title":"Howie Glatter Holographic Attachment w\/ Cross Hair Pattern","description":"\u003c!-- more --\u003e\n\u003cdiv class=\"warning\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?v=1714663206\" alt=\"Disclaimer\" width=\"25px\"\u003e\n\u003cp\u003eAs of Autumn 2020, the thread design on Howie Glatter lasers has changed. This attachment is compatible only with the newer, coarser thread. If you require an attachment for an older model with the finer thread, please contact us, they can be built on request.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eUseful for aligning the returning beam on collimator face.\u003cb\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eRemovable diffractive optical element for use in Glatter Holographic Collimators.\u003c\/strong\u003e\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eHowie Glatter Holographic Attachment\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eWhen it comes to lasers and collimation, one of the most trusted names in the business is guru Howie Glatter. His uncompromising quality and dedication to above average products, not only put his name above the rest - but in demand as the finest available on today's market. Usually a manufacturer doesn't take the time to explain to a customer exactly why their product excels over others - or why it performs better - but not Howie. Here's what he has to say about his new Howie Glatter Holographic Laser Collimator Attachment: \u003cb\u003e\u003cb\u003e The holographic collimator has a removable diffractive optical element (\"\"hologram\"\") placed in the beam, just ahead of the laser. It diffracts light from the laser to project a diverging, symmetrical pattern around the central beam which is quite useful for centering optical elements. My standard pattern is an illuminated ten line by ten line grid, forming a large square box enclosing eighty-one smaller squares. It covers a wider angle (21 degrees) than any other holographic collimator, which allows direct centering of f\/ 2.7 to f\/ 35 optics. It may seem counter-intuitive, but the square grid pattern gives greater sensitivity for centering circular optics of arbitrary size. If a mirror or lens is decentered by only a small amount against the grid pattern, it produces a proportionately larger asymmetry in the intersection points of the grid lines with the perimeter of the optic. Cross-hair patterns do not have this property. \u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eBecause there are some collimating situations in which the diffracted pattern is unnecessary or unwanted, or maximum power in the central beam may be desired, the diffractor unscrews from the laser aperture, converting the holographic collimator to single beam mode. When it is screwed back it retains its alignment accuracy.\"\" \u003cb\u003e\u003cb\u003e Accurate and Precise. What more could you ask? \u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cdiv data-custom-tab=\"\"\u003e\n\u003cp data-custom-tab-title=\"\"\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKnown To Fit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHowie Glatter laser collimators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298367773,"sku":"SI-HOLA-Cross Hair","price":84.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Holographic-Attachment-Cross-Hair-Pattern-for-Holographic-Collimator-SI-HOLA-CrossHair-1__43202.1596314049.1280.1280.jpg?v=1684340087"},{"product_id":"howie-glatter-single-635nm-red-beam-laser-collimator-1-25","title":"Howie Glatter Single 635nm Red Beam Laser Collimator - 1.25\"","description":"\u003c!-- more --\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSingle deep red beam operates at 635nm.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThe Howie Glatter Holographic Laser Collimator incorporates a solid state laser diode that does not fade or change with time and use.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFactory-aligned to 15 arc-seconds providing 0.1 inch accuracy at a distance of 20 feet,\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThe Howie Glatter Laser Collimator is shock resistant to keep its alignment - even when dropped.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eIncludes 123A lithium battery, 1mm aperture stop, and protective case. \u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003c\/p\u003e\u003ccenter\u003e\u003ch2\u003e Howie Glatter Single Deep Red Beam Laser Collimator 1.25\"\" 650nm\u003c\/h2\u003e\u003c\/center\u003e\u003cp\u003e When it comes to lasers and collimation, one of the most trusted names in the business is guru Howie Glatter. His uncompromising quality and dedication to above average products, not only put his name above the rest - but in demand as the finest available on today's market. Usually a manufacturer doesn't take the time to explain to a customer exactly why their product excels over others - or why it performs better - but not Howie. Here's what he has to say about his new Howie Glatter Laser Collimator: \u003cb\u003e\u003cb\u003e \"\"The lasers in my collimators are class IIIa lasers (maximum beam power: 5 thousandths of a Watt), and are quite safe if used with reasonable precaution. Direct or mirror-reflected eye exposure to the laser beam should always be avoided! You must be careful when collimating to ensure that the beam does not enter anyone's eye. There is no problem in viewing the beam's impact directly on a surface as long as the surface produces a diffuse reflection. The beam impact may also be safely viewed on a mirror or lens surface if the reflected or transmitted beam is not directed towards your eye. Information from studies I have seen suggests that in order to induce permanent damage, a class IIIa laser beam must stay focused on the retina for a long time. It's unlikely for this to happen because the pupil is a very small target and because we have a blink and aversion reflex to bright light. However, all precautions should still be followed to avoid the beam entering anyone's eye! A badly miscollimated Newtonian or Cassegrain telescope may allow the beam to exit the front of the telescope, so when collimating, check first by pointing the telescope at a wall or screen to see if the beam is getting out. With unobstructed telescopes such as refractors, the beam will always exit the front of the telescope, so run a strip of masking tape across a diameter of the dew cap opening as a safety beam stop. \u003cb\u003e\u003cb\u003e Inside the collimator is a solid-state laser diode, which emits an intense laser beam through a front aperture, exactly along the central axis of the cylindrical collimator body. The beam acts as a \"\"reference line\"\" from which alignments are made. For a laser collimator it is of supreme importance that the beam be aligned with the collimator's cylindrical axis, for if it is not, the resultant \"\"alignment\"\" of the telescope optics will be off-center and asymmetric, and the telescope will produce aberrated images.\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e When I started manufacturing laser collimators I realized that in order to produce consistent and accurate results they must be highly resistant to mechanical shock, so that internal laser alignment is maintained. I experimented with this aspect of collimator construction and developed a design which tremendously increased shock resistance. After aligning the laser within 15 arc seconds, I shock test each collimator by whacking it against a block of urethane plastic (urethane prevents marring), striking it at least a dozen times on three axis. I then recheck the laser alignment, and if it has not changed the collimator passes. I believe this is the most important difference setting my collimator apart from all others I know of. They will withstand a shock equivalent to dropping from eyepiece position, up the ladder on a big Dob, without alteration of laser alignment.\u003c\/p\u003e\u003cp\u003e\u003cb\u003e The beam from all red diode lasers used in collimators is fuzzy-edged and elliptical in cross-section. When collimating, you sometimes must judge the location of the center of the spot by eye. To improve collimating precision, all of my collimators (except 532nm) are supplied with a removable accessory plastic aperture stop having a 1mm hole, which push-fits into the laser aperture. It produces a tiny, circular beam impact which allows more accurate alignment. With the holographic collimators, it is not used at the same time as the holographic feature, and the diffractor must be removed to install the stop. With the stop inserted the beam impact at a distance of one meter or more looks like a star diffraction pattern, with a central dot surrounded by diffraction rings. The surrounding rings can help in centering the beam very accurately. \u003cb\u003e\u003cb\u003e I offer the red holographic collimators with a choice of either 650 nanometer or 635nm wavelength. The two lasers have the same radiometric power output, but because the human eye's sensitivity to the shorter wavelength is greater, the 635nm. laser appears about two or three times brighter. The higher cost of 635nm laser diodes increases the collimator price, but it enables holographic collimation in brighter ambient light. If you intend to collimate in early twilight, it is a good choice. In darkness, however, the 650nm laser is quite adequate. Because single beam collimators concentrate all the laser light in the central beam, the 650nm laser is quite adequate for them.\"\" \u003cb\u003e\u003cb\u003e Precise... Accurate... and Durable... What more could you ask? \u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e Laser Collimating Instructions\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOther Info\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHolagraphic and 1mm aperture stop thread:  5\/16-56\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298400541,"sku":"SI-LC125-635","price":308.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Single-Red-Beam-1-25-inch-Laser-Collimator-635nm-SI-LC125-635-1__74074.1596314050.1280.1280.jpg?v=1684340090"},{"product_id":"howie-glatter-single-650nm-red-beam-laser-collimator-2","title":"Howie Glatter Single 650nm Red Beam Laser Collimator - 2\"","description":"\u003c!-- more --\u003e\u003cp\u003e\u003cstrong\u003eSingle red beam operates at 650nm.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe Howie Glatter Laser Collimator incorporates a solid state laser diode that does not fade or change with time and use.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFactory-aligned to 15 arc-seconds providing 0.1 inch accuracy at a distance of 20 feet,\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe Howie Glatter Laser Collimator is shock resistant to keep its alignment - even when dropped.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIncludes 123A lithium battery, 1mm aperture stop, and protective case. \u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e Inside the collimator is a solid-state laser diode, which emits an intense laser beam through a front aperture, exactly along the central axis of the cylindrical collimator body. The beam acts as a \"\"reference line\"\" from which alignments are made. For a laser collimator it is of supreme importance that the beam be aligned with the collimator's cylindrical axis, for if it is not, the resultant \"\"alignment\"\" of the telescope optics will be off-center and asymmetric, and the telescope will produce aberrated images. \u003cb\u003e\u003cb\u003e \"\"When I started manufacturing laser collimators I realized that in order to produce consistent and accurate results they must be highly resistant to mechanical shock, so that internal laser alignment is maintained. I experimented with this aspect of collimator construction and developed a design which tremendously increased shock resistance. After aligning the laser within 15 arc seconds, I shock test each collimator by whacking it against a block of urethane plastic (urethane prevents marring), striking it at least a dozen times on three axis. I then recheck the laser alignment, and if it has not changed the collimator passes. I believe this is the most important difference setting my collimator apart from all others I know of. They will withstand a shock equivalent to dropping from eyepiece position, up the ladder on a big Dob, without alteration of laser alignment.\"\" \u003cb\u003e\u003cb\u003e The beam from all red diode lasers used in collimators is fuzzy-edged and elliptical in cross-section. When collimating, you sometimes must judge the location of the center of the spot by eye. To improve collimating precision, all of my collimators (except 532nm) are supplied with a removable accessory plastic aperture stop having a 1mm hole, which push-fits into the laser aperture. It produces a tiny, circular beam impact which allows more accurate alignment. With the holographic collimators, it is not used at the same time as the optional holographic feature, and the diffractor must be removed to install the stop. With the stop inserted the beam impact at a distance of one meter or more looks like a star diffraction pattern, with a central dot surrounded by diffraction rings. The surrounding rings can help in centering the beam very accurately. \u003cb\u003e\u003cb\u003e I offer the red holographic collimators with a choice of either 650 nanometer or 635nm wavelength. The two lasers have the same radiometric power output, but because the human eye's sensitivity to the shorter wavelength is greater, the 635nm. laser appears about two or three times brighter. The higher cost of 635nm laser diodes increases the collimator price, but it enables optional holographic collimation in brighter ambient light. If you intend to collimate in early twilight, it is a good choice. In darkness, however, the 650nm laser is quite adequate. Because single beam collimators concentrate all the laser light in the central beam, the 650nm laser is quite adequate for them.\"\" \u003cb\u003e\u003cb\u003e Precise... Accurate... and Durable... What more could you ask? \u003cb\u003e\u003cb\u003e\u003cb\u003e Laser Collimating Instructions\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003ccenter\u003e\u003c\/center\u003e\u003cp\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ccenter\u003e\u003ccenter\u003e\u003c\/center\u003e\u003c\/center\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ccenter\u003e\u003ch2\u003e Howie Glatter Single Red Beam Laser Collimator 2\"\" 635nm\u003c\/h2\u003e\u003c\/center\u003e\u003cp\u003e When it comes to lasers and collimation, one of the most trusted names in the business is guru Howie Glatter. His uncompromising quality and dedication to above average products, not only put his name above the rest - but in demand as the finest available on today's market. Usually a manufacturer doesn't take the time to explain to a customer exactly why their product excels over others - or why it performs better - but not Howie. Here's what he has to say about his new Howie Glatter Laser Collimator: \u003cb\u003e\u003cb\u003e \"\"The lasers in my collimators are class IIIa lasers (maximum beam power: 5 thousandths of a Watt), and are quite safe if used with reasonable precaution. Direct or mirror-reflected eye exposure to the laser beam should always be avoided! You must be careful when collimating to ensure that the beam does not enter anyone's eye. There is no problem in viewing the beam's impact directly on a surface as long as the surface produces a diffuse reflection. The beam impact may also be safely viewed on a mirror or lens surface if the reflected or transmitted beam is not directed towards your eye. Information from studies I have seen suggests that in order to induce permanent damage, a class IIIa laser beam must stay focused on the retina for a long time. It's unlikely for this to happen because the pupil is a very small target and because we have a blink and aversion reflex to bright light. However, all precautions should still be followed to avoid the beam entering anyone's eye! A badly miscollimated Newtonian or Cassegrain telescope may allow the beam to exit the front of the telescope, so when collimating, check first by pointing the telescope at a wall or screen to see if the beam is getting out. With unobstructed telescopes such as refractors, the beam will always exit the front of the telescope, so run a strip of masking tape across a diameter of the dew cap opening as a safety beam stop. \u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOther Info\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHolagraphic and 1mm aperture stop thread:  5\/16-56\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298466077,"sku":"SI-LC2-650","price":392.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Single-Red-Beam-2-inch-Laser-Collimator-650nm-SI-LC2-650-1__55503.1596314050.1280.1280.jpg?v=1684339892"},{"product_id":"howie-glatter-barlow-laser-collimator-attachment","title":"Howie Glatter Barlow Laser Collimator Attachment","description":"\u003c!-- more --\u003e\u003cdiv class=\"warning\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?v=1714663206\" alt=\"Disclaimer\" width=\"25px\"\u003e\n\u003cp\u003eAs of Autumn 2020, the thread design on Howie Glatter lasers has changed. This attachment is compatible only with the newer, coarser thread. If you require an attachment for an older model with the finer thread, please contact us, they can be built on request.\u003c\/p\u003e\n\u003c\/div\u003e\u003cul\u003e\n\u003cstrong\u003eAttaches to laser aperture for making the primary mirror adjustment quick, efficient and compact.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003cstrong\u003eThe Howie Glatter Barlow Laser Collimator Attachment diverges the beam just behind your barlow lens for accurate alignment.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003cstrong\u003eAllows the user to make solo adjustments.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003cstrong\u003eThe Howie Glatter Barlow Laser Collimator Attachment fits the threaded aperture of any of Glatter holographic collimator.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003cstrong\u003eDisc attachment with a small mounted barlow lens and flat white front surface screen. \u003c\/strong\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\u003ccenter\u003e\u003ch2\u003e Howie Glatter Laser Collimator Barlow Attachment\u003c\/h2\u003e\u003c\/center\u003e\u003cp\u003e When it comes to lasers and collimation, one of the most trusted names in the business is guru Howie Glatter. His uncompromising quality and dedication to above average products, not only put his name above the rest - but in demand as the finest available on today's market. Usually a manufacturer doesn't take the time to explain to a customer exactly why their product excels over others - or why it performs better - but not Howie. Here's what he has to say about his new Howie Glatter Laser Collimator Barlow Attachment: \u003cb\u003e\u003cb\u003e \"\"Normally, a telescope takes parallel light rays from a distant star and converges them to a point at the eyepiece focus. Barlowed laser collimation takes advantage of the fact that a telescope will work in reverse. Placing a colllimator into a barlow lens will cause the parallel rays of laser light to diverge, apparently from a point just behind the Barlow lens. The diverging rays projected from the laser-Barlow combination in the focuser are turned into a beam of all-parallel rays when they are reflected from the primary, except for where the center mark on the primary prevents the mirror from reflecting. This reflected beam, containing a superimposed shadow of the collimation target, is projected up to the secondary, and then reflected to the focuser. \u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003ccenter\u003e\u003c\/center\u003e\u003cp\u003e\u003cb\u003e If you placed your laser collimator into a conventional barlow lens, you need to attach a paper circle to the end of the barlow as a screen to view the shadow on. The paper circle needs to have a hole in it's center to pass the outgoing beam. The primary tilt is now adjusted to center the target shadow around the hole. The position of the shadow on the screen is effected very little by motion of the illuminating beam. It is almost startling to see the shadow remain stationary as you \"\"bend\"\" the collimator and Barlow around in the focusser, and the fuzzy perimeter of the diverged laser beam moves all over the place. \u003cb\u003e\u003cb\u003e My Self-Barlowed collimator has a Barlow attachment that screws to the laser aperture for making the primary adjustment. The Barlow attachment is a disc with a small barlow lens mounted in it's center hole, and a flat white front surface as a screen. It makes the Barlow procedure more compact and convenient. The Barlow attachment fits the threaded aperture of any of my holographic collimators, and it can be purchased separately as an additional accessory by those who already have the holographic collimator.\"\" \u003cb\u003e\u003cb\u003e Easy... Accurate... and Precise. What more could you ask? \u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298531613,"sku":"SI-BARATT","price":112.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Barlow-Laser-Collimator-Attachment-SI-BARATT-1__12181.1596314050.1280.1280.jpg?v=1684339893"},{"product_id":"howie-glatter-variable-laser-brightness-battery-cap-switch-upgrade-for-laser-collimators","title":"Howie Glatter Variable Laser Brightness Battery Cap\/Switch Upgrade for Laser Collimators","description":"\u003c!-- more --\u003e\u003cp\u003e\u003cspan\u003eVariable Laser Brightness battery cap\/switch upgrade for Howie Glatter laser collimators.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cdiv class=\"warning\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?v=1714663206\" alt=\"Disclaimer\" width=\"25px\"\u003e\n\u003cp\u003eAs of Autumn 2020, the thread design on Howie Glatter lasers has changed. This attachment is compatible only with the newer, coarser thread. If you require an attachment for an older model with the finer thread, please contact us, they can be built on request.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKnown To Fit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHowie Glatter Laser Collimators\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298564381,"sku":"SI-VLB","price":84.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Variable-Laser-Brightness-Battery-Cap-Switch-Upgrade-for-Laser-Collimators-SI-VLB-1__03688.1596314050.1280.1280.jpg?v=1684339898"},{"product_id":"howie-glatter-single-650nm-red-beam-laser-collimator-1-25","title":"Howie Glatter Single 650nm Red Beam Laser Collimator - 1.25\"","description":"\u003c!-- more --\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSingle deep red beam operates at 650nm.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThe Howie Glatter Holographic Laser Collimator incorporates a solid state laser diode that does not fade or change with time and use.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFactory-aligned to 15 arc-seconds providing 0.1 inch accuracy at a distance of 20 feet,\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThe Howie Glatter Laser Collimator is shock resistant to keep its alignment - even when dropped.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eIncludes 123A lithium battery, 1mm aperture stop, and protective case. \u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003c\/p\u003e\u003ccenter\u003e\u003ch2\u003e Howie Glatter Single Deep Red Beam Laser Collimator 1.25\"\" 650nm\u003c\/h2\u003e\u003c\/center\u003e\u003cp\u003e When it comes to lasers and collimation, one of the most trusted names in the business is guru Howie Glatter. His uncompromising quality and dedication to above average products, not only put his name above the rest - but in demand as the finest available on today's market. Usually a manufacturer doesn't take the time to explain to a customer exactly why their product excels over others - or why it performs better - but not Howie. Here's what he has to say about his new Howie Glatter Laser Collimator: \u003cb\u003e\u003cb\u003e \"\"The lasers in my collimators are class IIIa lasers (maximum beam power: 5 thousandths of a Watt), and are quite safe if used with reasonable precaution. Direct or mirror-reflected eye exposure to the laser beam should always be avoided! You must be careful when collimating to ensure that the beam does not enter anyone's eye. There is no problem in viewing the beam's impact directly on a surface as long as the surface produces a diffuse reflection. The beam impact may also be safely viewed on a mirror or lens surface if the reflected or transmitted beam is not directed towards your eye. Information from studies I have seen suggests that in order to induce permanent damage, a class IIIa laser beam must stay focused on the retina for a long time. It's unlikely for this to happen because the pupil is a very small target and because we have a blink and aversion reflex to bright light. However, all precautions should still be followed to avoid the beam entering anyone's eye! A badly miscollimated Newtonian or Cassegrain telescope may allow the beam to exit the front of the telescope, so when collimating, check first by pointing the telescope at a wall or screen to see if the beam is getting out. With unobstructed telescopes such as refractors, the beam will always exit the front of the telescope, so run a strip of masking tape across a diameter of the dew cap opening as a safety beam stop. \u003cb\u003e\u003cb\u003e Inside the collimator is a solid-state laser diode, which emits an intense laser beam through a front aperture, exactly along the central axis of the cylindrical collimator body. The beam acts as a \"\"reference line\"\" from which alignments are made. For a laser collimator it is of supreme importance that the beam be aligned with the collimator's cylindrical axis, for if it is not, the resultant \"\"alignment\"\" of the telescope optics will be off-center and asymmetric, and the telescope will produce aberrated images.\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e When I started manufacturing laser collimators I realized that in order to produce consistent and accurate results they must be highly resistant to mechanical shock, so that internal laser alignment is maintained. I experimented with this aspect of collimator construction and developed a design which tremendously increased shock resistance. After aligning the laser within 15 arc seconds, I shock test each collimator by whacking it against a block of urethane plastic (urethane prevents marring), striking it at least a dozen times on three axis. I then recheck the laser alignment, and if it has not changed the collimator passes. I believe this is the most important difference setting my collimator apart from all others I know of. They will withstand a shock equivalent to dropping from eyepiece position, up the ladder on a big Dob, without alteration of laser alignment.\u003c\/p\u003e\u003cp\u003e The beam from all red diode lasers used in collimators is fuzzy-edged and elliptical in cross-section. When collimating, you sometimes must judge the location of the center of the spot by eye. To improve collimating precision, all of my collimators (except 532nm) are supplied with a removable accessory plastic aperture stop having a 1mm hole, which push-fits into the laser aperture. It produces a tiny, circular beam impact which allows more accurate alignment. With the holographic collimators, it is not used at the same time as the holographic feature, and the diffractor must be removed to install the stop. With the stop inserted the beam impact at a distance of one meter or more looks like a star diffraction pattern, with a central dot surrounded by diffraction rings. The surrounding rings can help in centering the beam very accurately. \u003cb\u003e\u003cb\u003e I offer the red holographic collimators with a choice of either 650 nanometer or 635nm wavelength. The two lasers have the same radiometric power output, but because the human eye's sensitivity to the shorter wavelength is greater, the 635nm. laser appears about two or three times brighter. The higher cost of 635nm laser diodes increases the collimator price, but it enables holographic collimation in brighter ambient light. If you intend to collimate in early twilight, it is a good choice. In darkness, however, the 650nm laser is quite adequate. Because single beam collimators concentrate all the laser light in the central beam, the 650nm laser is quite adequate for them.\"\" \u003cb\u003e\u003cb\u003e Precise... Accurate... and Durable... What more could you ask? \u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e Laser Collimating Instructions\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOther Info\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHolagraphic and 1mm aperture stop thread:  5\/16-56\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298629917,"sku":"SI-LC125-650","price":294.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Single-Red-Beam-1-25-inch-Laser-Collimator-650nm-SI-LC125-650-1__87942.1596314051.1280.1280.jpg?v=1684339901"},{"product_id":"howie-glatter-single-635nm-red-beam-laser-collimator-2","title":"Howie Glatter Single 635nm Red Beam Laser Collimator - 2\"","description":"\u003c!-- more --\u003e\u003cp\u003e\u003cstrong\u003eSingle red beam operates at 635nm.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe Howie Glatter Laser Collimator incorporates a solid state laser diode that does not fade or change with time and use.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFactory-aligned to 15 arc-seconds providing 0.1 inch accuracy at a distance of 20 feet,\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe Howie Glatter Laser Collimator is shock resistant to keep its alignment - even when dropped.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIncludes 123A lithium battery, 1mm aperture stop, and protective case. \u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e Inside the collimator is a solid-state laser diode, which emits an intense laser beam through a front aperture, exactly along the central axis of the cylindrical collimator body. The beam acts as a \"\"reference line\"\" from which alignments are made. For a laser collimator it is of supreme importance that the beam be aligned with the collimator's cylindrical axis, for if it is not, the resultant \"\"alignment\"\" of the telescope optics will be off-center and asymmetric, and the telescope will produce aberrated images.\u003c\/p\u003e\u003cp\u003e \"\"When I started manufacturing laser collimators I realized that in order to produce consistent and accurate results they must be highly resistant to mechanical shock, so that internal laser alignment is maintained. I experimented with this aspect of collimator construction and developed a design which tremendously increased shock resistance. After aligning the laser within 15 arc seconds, I shock test each collimator by whacking it against a block of urethane plastic (urethane prevents marring), striking it at least a dozen times on three axis. I then recheck the laser alignment, and if it has not changed the collimator passes. I believe this is the most important difference setting my collimator apart from all others I know of. They will withstand a shock equivalent to dropping from eyepiece position, up the ladder on a big Dob, without alteration of laser alignment.\"\" \u003cb\u003e\u003cb\u003e The beam from all red diode lasers used in collimators is fuzzy-edged and elliptical in cross-section. When collimating, you sometimes must judge the location of the center of the spot by eye. To improve collimating precision, all of my collimators (except 532nm) are supplied with a removable accessory plastic aperture stop having a 1mm hole, which push-fits into the laser aperture. It produces a tiny, circular beam impact which allows more accurate alignment. With the holographic collimators, it is not used at the same time as the optional holographic feature, and the diffractor must be removed to install the stop. With the stop inserted the beam impact at a distance of one meter or more looks like a star diffraction pattern, with a central dot surrounded by diffraction rings. The surrounding rings can help in centering the beam very accurately. \u003cb\u003e\u003cb\u003e I offer the red holographic collimators with a choice of either 650 nanometer or 635nm wavelength. The two lasers have the same radiometric power output, but because the human eye's sensitivity to the shorter wavelength is greater, the 635nm. laser appears about two or three times brighter. The higher cost of 635nm laser diodes increases the collimator price, but it enables optional holographic collimation in brighter ambient light. If you intend to collimate in early twilight, it is a good choice. In darkness, however, the 650nm laser is quite adequate. Because single beam collimators concentrate all the laser light in the central beam, the 650nm laser is quite adequate for them.\"\" \u003cb\u003e\u003cb\u003e Precise... Accurate... and Durable... What more could you ask? \u003cb\u003e\u003cb\u003e\u003cb\u003e Laser Collimating Instructions\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOther Info\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHolagraphic and 1mm aperture stop thread:  5\/16-56\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298662685,"sku":"SI-LC2-635","price":420.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Single-Red-Beam-2-inch-Laser-Collimator-635nm-SI-LC2-635-1__98265.1596314051.1280.1280.jpg?v=1684339904"},{"product_id":"howie-glatter-single-635nm-red-beam-laser-collimator-1-25-2","title":"Howie Glatter Single 635nm Red Beam Laser Collimator - 1.25\"\/2\"","description":"\u003c!-- more --\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eSingle red beam operates at 635nm.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThe Howie Glatter Laser Collimator incorporates a solid state laser diode that does not fade or change with time and use.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFactory-aligned to 15 arc-seconds providing 0.1 inch accuracy at a distance of 20 feet,\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eThe Howie Glatter 2\"\"\/1.25\"\" Laser Collimator is shock resistant to keep its alignment - even when dropped.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eIncludes 123A lithium battery, 1mm aperture stop, and protective case. \u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e When I started manufacturing laser collimators I realized that in order to produce consistent and accurate results they must be highly resistant to mechanical shock, so that internal laser alignment is maintained. I experimented with this aspect of collimator construction and developed a design which tremendously increased shock resistance. After aligning the laser within 15 arc seconds, I shock test each collimator by whacking it against a block of urethane plastic (urethane prevents marring), striking it at least a dozen times on three axis. I then recheck the laser alignment, and if it has not changed the collimator passes. I believe this is the most important difference setting my collimator apart from all others I know of. They will withstand a shock equivalent to dropping from eyepiece position, up the ladder on a big Dob, without alteration of laser alignment.\u003c\/p\u003e\u003cp\u003e The beam from all red diode lasers used in collimators is fuzzy-edged and elliptical in cross-section. When collimating, you sometimes must judge the location of the center of the spot by eye. To improve collimating precision, all of my collimators (except 532nm) are supplied with a removable accessory plastic aperture stop having a 1mm hole, which push-fits into the laser aperture. It produces a tiny, circular beam impact which allows more accurate alignment. With the holographic collimators, it is not used at the same time as the holographic feature, and the diffractor must be removed to install the stop. With the stop inserted the beam impact at a distance of one meter or more looks like a star diffraction pattern, with a central dot surrounded by diffraction rings. The surrounding rings can help in centering the beam very accurately. \u003cb\u003e\u003cb\u003e I offer the red holographic collimators with a choice of either 650 nanometer or 635nm wavelength. The two lasers have the same radiometric power output, but because the human eye's sensitivity to the shorter wavelength is greater, the 635nm. laser appears about two or three times brighter. The higher cost of 635nm laser diodes increases the collimator price, but it enables holographic collimation in brighter ambient light. If you intend to collimate in early twilight, it is a good choice. In darkness, however, the 650nm laser is quite adequate. Because single beam collimators concentrate all the laser light in the central beam, the 650nm laser is quite adequate for them.\"\" \u003cb\u003e\u003cb\u003e Precise... Accurate... and Durable... What more could you ask? \u003cb\u003e\u003cb\u003e Laser Collimating Instructions\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOther Info\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHolagraphic and 1mm aperture stop thread:  5\/16-56\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298695453,"sku":"SI-LC2125-635","price":448.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Single-Red-Beam-2-inch-1-25-inch-Laser-Collimator-SI-LC2125-635-1__32247.1596314051.1280.1280.jpg?v=1684339907"},{"product_id":"howie-glatter-holographic-attachment-w-concentric-circle-pattern","title":"Howie Glatter Holographic Attachment w\/ Concentric Circle Pattern","description":"\u003c!-- more --\u003e\u003cdiv class=\"warning\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?v=1714663206\" alt=\"Disclaimer\" width=\"25px\"\u003e\n\u003cp\u003eAs of Autumn 2020, the thread design on Howie Glatter lasers has changed. This attachment is compatible only with the newer, coarser thread. If you require an attachment for an older model with the finer thread, please contact us, they can be built on request.\u003c\/p\u003e\n\u003c\/div\u003e\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eA nine-concentric circle pattern that spans 10 degrees and will reach to the edge of f\/ 5.7 optics. Recommended for scopes around this focal ratio or slower. The Laser light is spread over a smaller area it is brighter than the square grid pattern, this makes it particularly useful with Cassegrain scopes, where the pattern impact is sometimes scrutinized on the mirror surface. The projected pattern is seen only by light that is scattered from dust, dirt, or optical roughness, so a brighter pattern is better, especially if the mirrors are very clean.   \u003c\/strong\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRemovable diffractive optical element for use in Glatter Holographic Collimators. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\u003ccenter\u003e\u003ch2\u003e Howie Glatter Holographic Attachment\u003c\/h2\u003e\u003c\/center\u003e\u003cp\u003e When it comes to lasers and collimation, one of the most trusted names in the business is guru Howie Glatter. His uncompromising quality and dedication to above average products, not only put his name above the rest - but in demand as the finest available on today's market. Usually a manufacturer doesn't take the time to explain to a customer exactly why their product excels over others - or why it performs better - but not Howie. Here's what he has to say about his new Howie Glatter Holographic Laser Collimator Attachment: \u003cb\u003e\u003cb\u003e The holographic collimator has a removable diffractive optical element (\"\"hologram\"\") placed in the beam, just ahead of the laser. It diffracts light from the laser to project a diverging, symmetrical pattern around the central beam which is quite useful for centering optical elements. My standard pattern is an illuminated ten line by ten line grid, forming a large square box enclosing eighty-one smaller squares. It covers a wider angle (21 degrees) than any other holographic collimator, which allows direct centering of f\/ 2.7 to f\/ 35 optics. It may seem counter-intuitive, but the square grid pattern gives greater sensitivity for centering circular optics of arbitrary size. If a mirror or lens is decentered by only a small amount against the grid pattern, it produces a proportionately larger asymmetry in the intersection points of the grid lines with the perimeter of the optic. Cross-hair patterns do not have this property. \u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e Because there are some collimating situations in which the diffracted pattern is unnecessary or unwanted, or maximum power in the central beam may be desired, the diffractor unscrews from the laser aperture, converting the holographic collimator to single beam mode. When it is screwed back it retains its alignment accuracy.\"\" \u003cb\u003e\u003cb\u003e Accurate and Precise. What more could you ask? \u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKnown To Fit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHowie Glatter laser collimators\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298728221,"sku":"SI-HOLA-Circle","price":154.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Holographic-Attachment-Concentric-Circle-Pattern-for-HOLOGRAPHIC-COLLIMAtoR-SI-HOLA-Circle-1__45542.1596314052.1280.1280.jpg?v=1684339909"},{"product_id":"howie-glatter-tublug-2-newtonian-collimator","title":"Howie Glatter TuBLUG-2\" Newtonian Collimator","description":"\u003c!-- more --\u003e\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan\u003eUser Instructions\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e·\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cb\u003eUse with a regular laser collimator in single beam mode to perform barlowed laser Newtonian primary mirror alignment on closed tube reflectors.\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e·\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cb\u003eThe Howie Glatter TuBLUG is inserted into the \u003c\/b\u003e\u003cspan\u003e\u003cb\u003efocusers' \u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003e\u003cb\u003edraw tube in which the laser collimator then attaches to the otherside of the TuBLUG\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e·\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cb\u003eMatte-white 45 degree face and anti-reflection coated Barlow lens mounted in a central axial hole.\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e·\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cb\u003eThe Howie Glatter TuBLUG is easily visible from primary adjustment position and can be turned 180 degrees to face the front and has a cut-out.\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cspan\u003e\u003c\/span\u003eHowie Glatter 2\"\" TuBLUG Newtonian Laser Collimator\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eWhen it comes to lasers and collimation, one of the most trusted names in the business is guru Howie Glatter. His uncompromising quality and dedication to above average products, not only put his name above the rest - but in demand as the finest available on today's market. \u003cb\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298760989,"sku":"SI-TUBLUG2","price":336.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-TuBLUG-2-inch-Newtonian-Collimator-SI-TUBLUG2-1__10047.1596314052.1280.1280.jpg?v=1684339911"},{"product_id":"howie-glatter-tublug-1-25-newtonian-collimator","title":"Howie Glatter TuBLUG-1.25\" Newtonian Collimator","description":"\u003c!-- more --\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eUser Instructions\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e·\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cb\u003eUse with a regular laser collimator in single beam mode to perform barlowed laser Newtonian primary mirror alignment on closed tube reflectors.\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e·\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cb\u003eThe Howie Glatter TuBLUG is inserted into the focuser in which the laser collimator then attaches to the otherside of the TuBLUG\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e·\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cb\u003eMatte-white 45 degree face and anti-reflection coated Barlow lens mounted in a central axial hole.\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e·\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cb\u003eThe Howie Glatter TuBLUG is easily visible from primary adjustment position and can be turned 180 degrees to face the front and has a cut-out.\u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003cspan\u003e\u003c\/span\u003eHowie Glatter 2\"\" TuBLUG Newtonian Laser Collimator\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eWhen it comes to lasers and collimation, one of the most trusted names in the business is guru Howie Glatter. His uncompromising quality and dedication to above average products, not only put his name above the rest - but in demand as the finest available on today's market. \u003cb\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298826525,"sku":"SI-TUBLUG1.25","price":224.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-TuBLUG-1-25-inch-Newtonian-Collimator-SI-TUBLUG1.25-1__59530.1596314052.1280.1280.jpg?v=1684339913"},{"product_id":"howie-glatter-holographic-attachment-w-square-grid-pattern","title":"Howie Glatter Holographic Attachment w\/ Square Grid Pattern","description":"\u003c!-- more --\u003e\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eA 10 x 10 line square grid pattern. It spreads 21 degrees which allows centering of optics as fast as f\/ 2.7.  This pattern is recommended for general use because it can be used with the fastest telescopes likely to be encountered.\u003c\/strong\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eRemovable diffractive optical element for use in Glatter Holographic Collimators.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\u003ccenter\u003e\u003ch2\u003e Howie Glatter Holographic Attachment\u003c\/h2\u003e\u003c\/center\u003e\u003cp\u003e When it comes to lasers and collimation, one of the most trusted names in the business is guru Howie Glatter. His uncompromising quality and dedication to above average products, not only put his name above the rest - but in demand as the finest available on today's market. Usually a manufacturer doesn't take the time to explain to a customer exactly why their product excels over others - or why it performs better - but not Howie. Here's what he has to say about his new Howie Glatter Holographic Laser Collimator Attachment: \u003cb\u003e\u003cb\u003e The holographic collimator has a removable diffractive optical element (\"\"hologram\"\") placed in the beam, just ahead of the laser. It diffracts light from the laser to project a diverging, symmetrical pattern around the central beam which is quite useful for centering optical elements. My standard pattern is an illuminated ten line by ten line grid, forming a large square box enclosing eighty-one smaller squares. It covers a wider angle (21 degrees) than any other holographic collimator, which allows direct centering of f\/ 2.7 to f\/ 35 optics. It may seem counter-intuitive, but the square grid pattern gives greater sensitivity for centering circular optics of arbitrary size. If a mirror or lens is decentered by only a small amount against the grid pattern, it produces a proportionately larger asymmetry in the intersection points of the grid lines with the perimeter of the optic. Cross-hair patterns do not have this property. \u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cp\u003e Because there are some collimating situations in which the diffracted pattern is unnecessary or unwanted, or maximum power in the central beam may be desired, the diffractor unscrews from the laser aperture, converting the holographic collimator to single beam mode. When it is screwed back it retains its alignment accuracy.\"\" \u003cb\u003e\u003cb\u003e Accurate and Precise. What more could you ask? \u003cb\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\u003cdiv data-custom-tab\u003e\n\u003cp data-custom-tab-title\u003eSpecifications\u003c\/p\u003e\n\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKnown To Fit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHowie Glatter laser collimators\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Howie Glatter","offers":[{"title":"Default Title","offer_id":44967298859293,"sku":"SI-HOLA-Square","price":112.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Starlight-Instruments-Holographic-Attachment-Square-Grid-Pattern-for-Holographic-Collimator-SI-HOLA-Square-1__48167.1596314053.1280.1280.jpg?v=1684339918"}],"url":"https:\/\/davidastro.com\/collections\/howie-glatter-collimation-tools.oembed","provider":"David Astro","version":"1.0","type":"link"}