{"title":"Explore Scientific AR Doublet Refractors","description":"\u003cp\u003eExplore Scientific AR refractors are achromatic doublet refractors in 102mm, 127mm and 152mm apertures. The AR102, AR127 and AR152 put a lot of aperture in a refractor with a relatively short tube, well suited to wide views of the Milky Way, open clusters and bright nebulae.\u003c\/p\u003e\u003cp\u003eAs achromats, they show some color fringing on bright objects at high magnification, so they are most at home as visual instruments at low and medium power. The AR152 suits observers who want a large refractor for sweeping and outreach.\u003c\/p\u003e","products":[{"product_id":"explore-scientific-ar127-doublet-refractor","title":"Explore Scientific AR127 Doublet Refractor","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e127mm Achromatic Doublet Refractor\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Crown-and-Flint Optics\u003c\/li\u003e\n\u003cli\u003eDual-Speed Focuser for Fine Adjustment\u003c\/li\u003e\n\u003cli\u003eDielectric-Coated Diagonal Included\u003c\/li\u003e\n\u003cli\u003eCradle Ring Assembly with Vixen-Style Dovetail\u003c\/li\u003e\n\u003cli\u003e8x50 Straight-Through Finderscope\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eExplore Scientific AR127 Doublet Refractor\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific AR127 refractor uses a classic 127mm air-spaced, crown-and-flint doublet objective to deliver high-contrast, sharp images of celestial objects at a fraction of the cost of a true apochromatic design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe AR127's 127mm Air-Spaced Doublet Lens\u003c\/h3\u003e\n\u003cp\u003eThis telescope's optical heart is its 127mm (5-inch) achromatic objective lens. The air-spaced doublet design, using traditional crown and flint glasses, provides sharp, detailed views of the Moon, planets, and deep-sky objects. It gathers significantly more light than smaller refractors, resolving details like Jupiter's cloud bands and the Cassini Division in Saturn's rings.\u003c\/p\u003e\n\u003cp\u003eAs an achromatic refractor, its primary strength is exceptional contrast for its aperture class. However, a degree of chromatic aberration, or false color, is inherent to the design and will be visible as a slight violet halo around the brightest stars and planetary limbs. This is a well-understood trade-off for achieving this level of aperture and portability at this price point.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eBuilt for Outreach: Heavy-Duty Focuser and Mounting\u003c\/h3\u003e\n\u003cp\u003eDesigned to withstand the rigors of frequent transport and use at star parties, the AR127 is equipped with robust, professional-grade components. The OTA includes a smooth, dual-speed focuser, allowing for both coarse and fine focus adjustments critical for achieving sharp images at high magnification. A high-reflectivity 2-inch dielectric diagonal is included to ensure maximum light transmission to the eyepiece.\u003c\/p\u003e\n\u003cp\u003eThe package is completed with a sturdy cradle ring assembly that attaches to a Vixen-style dovetail bar, making it compatible with a wide range of popular German equatorial and alt-azimuth mounts. An 8x50 straight-through finderscope with a quick-release bracket is also included to help you locate and center objects in the main eyepiece.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of views can I expect from the AR127 on the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its 127mm aperture, the AR127 will provide bright, detailed views of the Orion Nebula (M42). You can expect to resolve the four main stars of the Trapezium at the nebula's core and see extensive nebulosity stretching across the field of view, especially from a dark-sky site. The fast f\/6.5 focal ratio makes it well-suited for framing large deep-sky objects like this.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the AR127's achromatic design handle bright objects like Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AR127 will show significant detail on Jupiter, including its main equatorial belts, zones, and the Great Red Spot. However, because it is an achromatic refractor, you will notice a faint purple or violet halo around the planet's limb. This is known as chromatic aberration and is a normal characteristic of this optical design. Using a light yellow or a specialized fringe-killer filter can help reduce this effect and improve contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Explore Scientific AR127 suitable for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the AR127 can be used for astrophotography, particularly for lunar and planetary imaging where its sharpness is an asset. For deep-sky imaging, the inherent chromatic aberration will cause stars to appear bloated with colored halos. This can be managed with specialized filters and processing techniques, but for serious deep-sky work, an apochromatic (APO) refractor is generally recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat type of mount is recommended for the AR127 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA sturdy German equatorial mount like the Explore Scientific iEXOS-100, Celestron Advanced VX, or Sky-Watcher EQM-35 is a good match for visual use and light imaging with the AR127. For more serious astrophotography, a mount with a higher payload capacity is recommended to handle the telescope and additional camera gear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the benefit of the AR127's dual-speed focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe dual-speed focuser provides two focusing knobs. The larger knob allows for rapid, coarse adjustments to quickly find the general focus point. The smaller knob offers a fine-adjustment ratio (typically 10:1), enabling you to make very small, precise changes to achieve critical sharpness, which is especially important for high-magnification planetary viewing and astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I get optical test data for my specific AR127 telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Explore Scientific offers interferometric optical data for your specific telescope upon request. You must own the telescope for at least 120 days before contacting their customer service to request the report for your serial number.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257010974\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967204684061,"sku":"ES-DAR127065-02","price":1049.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-AR127-Air-Spaced-Doublet-Refractor-Telescope-DAR127065-01-DAR127065-01-1__42087.1594240382.1280.1280.jpg?v=1684338987"},{"product_id":"explore-scientific-ar152-doublet-refractor","title":"Explore Scientific AR152 Doublet Refractor","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e152mm (6-inch) Aperture\u003c\/li\u003e\n\u003cli\u003ef\/6.5 Focal Ratio\u003c\/li\u003e\n\u003cli\u003eAir-Spaced Doublet Achromatic Optics\u003c\/li\u003e\n\u003cli\u003e2\" Dual-Speed Focuser\u003c\/li\u003e\n\u003cli\u003e2\" Diagonal with 99% Dielectric Coatings\u003c\/li\u003e\n\u003cli\u003e8x50 Straight-Through Finderscope\u003c\/li\u003e\n\u003cli\u003eVixen-Style Dovetail\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eExplore Scientific AR152 Doublet Refractor\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific AR152 Doublet Refractor combines a large 152mm (6-inch) aperture with a fast f\/6.5 focal ratio for bright, wide-field views of deep-sky objects. Its air-spaced, diffraction-limited optics are paired with a robust 2-inch dual-speed focuser, a 99% reflective 2-inch dielectric diagonal, and an 8x50 finder scope, delivering a complete optical tube assembly ready for your mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e152mm f\/6.5 Optics: Bright, Wide-Field Achromatic Views\u003c\/h3\u003e\n\u003cp\u003eWith a 152mm objective, this refractor gathers a significant amount of light, revealing faint details in galaxies and bringing out the structure in nebulae like the Orion Nebula (M42). The f\/6.5 focal ratio creates a wide true field of view, making it easy to frame large star clusters and sweeping portions of the Milky Way. The classic crown-and-flint doublet design offers sharp, high-contrast images at an unmatched value.\u003c\/p\u003e\n\u003cp\u003eAs an achromatic refractor, the AR152 will exhibit some chromatic aberration, or \"false color,\" visible as a slight violet halo around the brightest stars and the limb of the Moon. This is an inherent trade-off for achieving such a large aperture in a refractor at this price point. For deep-sky observation, this effect is often negligible and is a small price to pay for the bright, immersive views the 6-inch objective provides.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eBuilt for Outreach: A 2\" Dual-Speed Focuser and Heavy-Duty Components\u003c\/h3\u003e\n\u003cp\u003eEngineered for durability, the AR152 is built to handle the demands of public star parties and frequent use. The optical tube is equipped with a smooth 2-inch dual-speed focuser, allowing for rapid coarse adjustments and critical fine-tuning for sharp planetary detail or astrophotography. This precision is essential for getting the most out of the telescope's high-resolution optics.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" Dielectric Diagonal:\u003c\/strong\u003e The included one-piece diagonal features 99% reflective dielectric coatings, ensuring minimal light loss for the brightest possible images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8x50 Finder Scope:\u003c\/strong\u003e The large 8x50 straight-through finderscope makes locating celestial objects simple and intuitive. It mounts to the new Hybrid 2N1 Finder Scope Base via a quick-release bracket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVixen-Style Dovetail:\u003c\/strong\u003e A standard Vixen-style dovetail is attached to the cradle ring, providing secure and broad compatibility with a wide range of popular alt-azimuth and equatorial mounts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAR152 vs. an ED APO: The Aperture-for-Cost Trade-Off\u003c\/h3\u003e\n\u003cp\u003eWhen considering the AR152, many observers weigh it against smaller, more expensive apochromatic (APO) refractors. The choice comes down to your primary observing targets and budget.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAPO Advantage:\u003c\/strong\u003e An ED Apochromatic refractor, such as a 127mm model, will deliver views that are virtually free of chromatic aberration. This results in textbook-perfect color correction on bright stars, planets, and the Moon, which is a significant advantage for planetary imagers and visual purists.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAR152 Advantage:\u003c\/strong\u003e The 152mm aperture of the AR152 gathers over 40% more light than a 127mm telescope. This increase in light grasp means fainter deep-sky objects will appear brighter and more detailed. For observers focused on galaxies, nebulae, and star clusters, the extra aperture is often the deciding factor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUltimately, the AR152 offers more light-gathering power and higher resolution for the dollar. If your passion is deep-sky observing and you can accept a minor amount of false color on the brightest targets, the AR152 delivers impressive views and exceptional value.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy choose the Explore Scientific AR152 over a smaller apochromatic refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary reason is \u003cstrong\u003eaperture\u003c\/strong\u003e. The AR152's 152mm objective collects significantly more light than smaller APOs (e.g., 102mm or 127mm), resulting in brighter images of faint deep-sky objects like galaxies and nebulae. While an APO offers superior color correction, the AR152 provides greater light-gathering power for a lower cost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is best for the Explore Scientific AR152?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AR152 is a substantial optical tube. You will need a sturdy mount with a payload capacity of at least 30-35 lbs to ensure stability, especially in windy conditions. For visual use, a robust alt-azimuth mount like an Explore Scientific Twilight II or a Sky-Watcher AZ-EQ5 would work well. For astrophotography, a German Equatorial Mount in the Celestron CGEM II or iOptron CEM40 class is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the AR152 perform on planets like Jupiter and Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AR152's 152mm aperture provides high resolution capable of showing significant planetary detail. You can expect to see Jupiter's main cloud belts, the Great Red Spot, and its four Galilean moons. On Saturn, the Cassini Division in the rings will be clearly visible, along with cloud bands on the planet itself. Due to its achromatic design, you will notice a violet fringe around the bright planetary disks, which can be reduced with a fringe-killer or minus-violet filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the chromatic aberration of the AR152 a problem for deep-sky viewing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor most deep-sky objects, chromatic aberration is not a significant issue. Nebulae and galaxies are diffuse and lack the hard, high-contrast edges that make false color prominent. The effect is most noticeable on bright, pinpoint stars, where you may see a soft violet halo. Most deep-sky observers find the bright, wide-field views from the 6-inch aperture to be a worthwhile trade-off.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 2-inch eyepieces and filters with the AR152?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Explore Scientific AR152 comes standard with a 2-inch dual-speed focuser and a 2-inch 99% dielectric diagonal. This allows you to use 2-inch eyepieces for wide, immersive views and 2-inch filters, such as UHC or O-III filters for enhancing nebula observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat can I expect to see in the Orion Nebula (M42) with the AR152 from a suburban location?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFrom a suburban backyard, the AR152's 6-inch aperture will provide stunning views of the Orion Nebula (M42). You will easily resolve the four main stars of the Trapezium cluster at its core. The bright, gaseous wings of the nebula will show intricate wisps and mottling, and with a UHC filter, you can trace the faint outer loops of nebulosity much further than with a smaller telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e152mm (6 inches)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Crown-and-Flint Achromatic Doublet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptics\u003c\/td\u003e\n\u003ctd\u003eDiffraction-Limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2-inch Dual-Speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagonal\u003c\/td\u003e\n\u003ctd\u003e2-inch with 99% Dielectric Coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e8x50 Straight-Through on Quick-Release Bracket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eCradle Ring with Vixen-Style Dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257011032\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAR152 Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Dual-Speed Focuser\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Diagonal with 99% Dielectric Coatings\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e8x50 Finderscope with Bracket\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCradle Ring with Vixen-Style Dovetail\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHybrid 2N1 Finder Scope Base\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Explore_Scientific_Introduction_Booklet_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty Policy\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967207272733,"sku":"ES-DAR152065-02","price":1189.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-AR152-Air-Spaced-Doublet-Refractor-DAR152065-01-DAR152065-01-1__14562.1594240384.1280.1280.jpg?v=1684338861"},{"product_id":"explore-scientific-ar102-doublet-refractor","title":"Explore Scientific AR102 Doublet Refractor","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e102mm (4-inch) Aperture\u003c\/li\u003e\n\u003cli\u003ef\/6.5 Focal Ratio\u003c\/li\u003e\n\u003cli\u003e11.5 lbs Optical Tube Weight\u003c\/li\u003e\n\u003cli\u003eTwo-Speed 2\" Crayford Focuser\u003c\/li\u003e\n\u003cli\u003eIncludes 2\" Dielectric Diagonal \u0026amp; 8x50 Finderscope\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eExplore Scientific AR102 Doublet Refractor\u003c\/h2\u003e\n\u003cp\u003eThe Explore Scientific AR102 Doublet Refractor combines a 102mm air-spaced doublet objective with a fast f\/6.5 focal ratio to deliver bright, high-contrast images of the Moon, planets, and deep-sky objects. Weighing just 11.5 lbs, this optical tube assembly is exceptionally portable and comes equipped with a 2-inch two-speed Crayford focuser, a 2-inch dielectric diagonal, and an 8x50 finderscope for a complete observing package right out of the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 102mm f\/6.5 Air-Spaced Doublet\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the AR102 is a classic crown-and-flint air-spaced doublet lens. This design provides sharp, contrasty views that make it an excellent choice for detailed lunar observation, resolving the cloud belts of Jupiter, or framing bright star clusters like the Pleiades (M45). Its f\/6.5 focal ratio offers a wide field of view, ideal for sweeping the Milky Way.\u003c\/p\u003e\n\u003cp\u003eAs an achromatic refractor, the AR102 will exhibit some minor chromatic aberration, or false color, on the brightest objects like Venus and Sirius. This is an expected optical trade-off for the design, which prioritizes portability and affordability over the color correction of a more expensive apochromatic system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Ready-to-Image Platform: 2-Speed Focuser and 2\" Diagonal\u003c\/h3\u003e\n\u003cp\u003eExplore Scientific includes professional-grade components that elevate the AR102's usability. The precision two-speed 2\" Crayford focuser allows for smooth, exact focus adjustments, which are critical for capturing sharp planetary images. The included 2\" dielectric-coated diagonal maximizes light transmission and enables the use of wide-field 2\" eyepieces for immersive views.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e8x50 Finderscope:\u003c\/strong\u003e The large aperture straight-through finder makes locating faint targets significantly easier than with smaller red-dot finders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick-Release Base:\u003c\/strong\u003e The finder mounts to a hybrid quick-release base for fast setup and breakdown.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVixen-Style Dovetail:\u003c\/strong\u003e A sturdy cradle ring with a standard Vixen-style dovetail plate ensures compatibility with a vast range of popular astronomical mounts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eGrab-and-Go Astronomy at 11.5 lbs\u003c\/h3\u003e\n\u003cp\u003eWith an optical tube weight of only 11.5 lbs, the AR102 is a truly portable instrument. It's light enough to be managed easily by one person and pairs well with medium-duty alt-azimuth or equatorial mounts, creating a setup that can be moved and assembled in minutes. This portability makes it an ideal telescope for educational outreach, public star parties, or simply taking to a dark-sky site on a moment's notice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eExplore Scientific AR102 vs. Standard 4-inch Achromats\u003c\/h3\u003e\n\u003cp\u003eWhile many 4-inch achromatic refractors offer similar optical views, the AR102 distinguishes itself with its standard accessories. Competing telescopes in this class often ship with a basic single-speed focuser and a 1.25\" diagonal, requiring immediate upgrades for serious observing or imaging.\u003c\/p\u003e\n\u003cp\u003eThe Explore Scientific AR102, by contrast, includes a two-speed focuser and a 2\" dielectric diagonal from the start. These features provide a superior out-of-the-box experience, saving you the expense and effort of sourcing these critical components separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of mount is best for the Explore Scientific AR102?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith its light weight of \u003cstrong\u003e11.5 lbs\u003c\/strong\u003e, the AR102 is well-supported by a variety of mounts. For visual use, a medium-duty alt-azimuth mount like the Explore Scientific Twilight I or a Vixen Porta Mount II will provide a stable, intuitive grab-and-go setup. For astrophotography, a German equatorial mount with a payload capacity of at least 20 lbs, such as a Celestron AVX or Sky-Watcher HEQ5, is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I see color fringing (chromatic aberration) with the AR102 refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, as an achromatic refractor, the AR102 will show a slight purple or violet halo around the brightest stars and planetary limbs. This is a characteristic of the two-element lens design. While it is noticeable on targets like Vega or Jupiter, it is generally well-controlled and does not significantly impact views of fainter deep-sky objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Explore Scientific AR102 perform on the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe AR102 provides excellent views of the Orion Nebula (M42). Its \u003cstrong\u003e102mm aperture\u003c\/strong\u003e gathers enough light to reveal the intricate structures of the nebula's gas clouds, and the f\/6.5 focal ratio allows you to frame the entire object in a single field of view with a low-power, wide-field eyepiece. You will be able to easily resolve the four primary stars of the Trapezium cluster at its core.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the AR102 a good telescope for viewing Jupiter and Saturn?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The AR102's high-contrast optics are well-suited for planetary viewing. With a good quality high-power eyepiece, you will be able to clearly see Jupiter's main cloud belts and its four Galilean moons. On Saturn, the rings are sharply defined, and you can often spot the Cassini Division on nights of steady seeing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 2-inch eyepieces with the Explore Scientific AR102?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The AR102 comes standard with a \u003cstrong\u003e2-inch focuser\u003c\/strong\u003e and a \u003cstrong\u003e2-inch diagonal\u003c\/strong\u003e, allowing you to take full advantage of wide-field 2-inch eyepieces. This is a significant advantage for observing large deep-sky objects and star fields.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do I need to start astrophotography with the Explore Scientific AR102?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo begin imaging with the AR102, you will need a sturdy German equatorial mount for tracking, a camera (DSLR or dedicated astronomy camera), and a T-ring and T-adapter to connect the camera to the telescope's focuser. For improved results, a field flattener is recommended to correct for field curvature inherent in fast refractors, and an autoguiding system will enable longer, sharper exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eAir-Spaced Crown-and-Flint Doublet Achromat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e102mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e663mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e2\" Two-Speed Crayford\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagonal\u003c\/td\u003e\n\u003ctd\u003e2\" Dielectric, 99% Reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e8x50 Straight-Through\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eCradle Rings with Vixen-Style Dovetail Plate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e11.5 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGTIN\u003c\/td\u003e\n\u003ctd\u003e812257010080\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAR102 Optical Tube Assembly\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Two-Speed Crayford Focuser\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Dielectric Diagonal\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e8x50 Straight-Through Finderscope with Bracket\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCradle Ring Assembly with Vixen-Style Dovetail\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDust Caps\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/explore-scientific-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eExplore Scientific Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44967207698717,"sku":"ES-DAR102065-02","price":629.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Explore-Scientific-AR102-Air-Spaced-Doublet-Refractor-DAR102065-01-DAR102065-01-1__23671.1594240392.1280.1280.jpg?v=1684338864"}],"url":"https:\/\/davidastro.com\/en-us\/collections\/explore-scientific-ar-doublet-refractors.oembed","provider":"David Astro","version":"1.0","type":"link"}