{"product_id":"tele-vue-4x-powermate-2-inch","title":"Tele Vue 4x Powermate - 2\"","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMagnification Factor: 4x\u003c\/li\u003e\n\u003cli\u003eBarrel Size: 2\"\u003c\/li\u003e\n\u003cli\u003eOptical Design: 4-Element Pupillary Corrector\u003c\/li\u003e\n\u003cli\u003eCompatibility: 2\" and 1.25\" Eyepieces (with adapter)\u003c\/li\u003e\n\u003cli\u003ePrimary Use: High-Magnification Visual and Imaging\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\u003eReach Deeper with the Tele Vue 4x Powermate\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eTele Vue 4x Powermate - 2\"\u003c\/strong\u003e is a professional-grade magnification amplifier, engineered to quadruple the power of your eyepieces or imaging camera without the optical compromises of a standard Barlow lens. It is the definitive choice for serious planetary observers and imagers seeking the highest levels of magnification while preserving the optical integrity of their telescope system. This is not just a Barlow; it is a sophisticated, four-element optical system designed for uncompromising performance.\u003c\/p\u003e\n\u003cp\u003eFor observers with fast Dobsonian reflectors or Schmidt-Cassegrains, the 4x Powermate delivers the extreme focal lengths necessary to resolve fine details on Jupiter's cloud belts, Cassini's Division in Saturn's rings, and subtle albedo features on Mars. It allows you to use your comfortable, long eye relief, low-power eyepieces for high-power observing, transforming them into planetary performers. The result is a level of magnification that is sharp, bright, and free of the aberrations that can plague simpler amplifier designs.\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 Powermate Optical Concept\u003c\/h3\u003e\n\u003cp\u003eUnlike a conventional Barlow lens, which diverges light rays, the Tele Vue 4x Powermate features a four-element, pupillary-correcting design. This sophisticated system re-collimates the light exiting the Powermate, making the rays parallel to the optical axis. This telecentric output is the key to its superior performance, especially with modern, wide-field eyepieces.\u003c\/p\u003e\n\u003cp\u003eThe practical benefit is that the Powermate does not alter the eyepiece's intended eye relief or introduce spherical aberration to the exit pupil. Your long eye relief 2\" eyepiece remains comfortable to use, and the field remains sharp from edge to edge. This is a critical distinction that sets the Powermate in a class of its own for high-power visual use.\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\u003eTelecentric Performance for Imaging and Solar\u003c\/h3\u003e\n\u003cp\u003eThe telecentric output of the 4x Powermate is a significant advantage for specialized applications. For hydrogen-alpha solar observing with etalon-based filters, this parallel light path is essential. It ensures the filter's bandpass remains consistent across the entire field of view, preventing off-axis hot-spotting and delivering a uniform, high-contrast solar disk.\u003c\/p\u003e\n\u003cp\u003eFor planetary imagers, the telecentric design means the magnification factor remains constant regardless of the camera's distance from the top of the Powermate. This consistency simplifies achieving the correct image scale for optimal sampling with your specific camera sensor. It effectively turns your telescope into a longer focal ratio instrument without introducing the optical compromises of a traditional Barlow.\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\u003eHigh-Transmission Multi-Coated Optics\u003c\/h3\u003e\n\u003cp\u003eEvery air-to-glass surface in the 4x Powermate receives Tele Vue's proprietary multi-layer coatings. These advanced coatings are optimized for high transmission across the visual spectrum, ensuring that the magnified image is as bright and high-contrast as possible. This is not a system that dims the view; it simply enlarges it.\u003c\/p\u003e\n\u003cp\u003eMaximizing light throughput is critical when working at the high magnifications this unit provides. By minimizing reflections and internal scattering, the Powermate delivers a clean, crisp image with a dark background. This allows you to push your telescope to its theoretical limits on nights of good seeing, teasing out faint planetary details that would otherwise be lost in glare.\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\u003eSecure, Non-Marring Connections\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eTele Vue 4x Powermate - 2\"\u003c\/strong\u003e is built for heavy-duty use with large 2\" eyepieces and imaging equipment. The chromed 2\" barrel provides a durable, smooth surface that slides easily into your focuser and resists wear. A captive setscrew ensures you cannot accidentally drop the screw in the dark.\u003c\/p\u003e\n\u003cp\u003eInside the eyepiece holder, a soft brass clamp ring provides a secure grip on your accessories without marring their barrels. Unlike a simple thumbscrew that digs into the barrel, this compression ring distributes pressure evenly, protecting your investment in premium eyepieces and cameras while ensuring a perfectly centered optical alignment.\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 High-Power Planetary Imaging Lens\u003c\/h3\u003e\n\u003cp\u003eThe optical section of the 4x Powermate can be unthreaded from its 2\" barrel, revealing a male thread. With the addition of a PMT-4201 T-Ring Adapter, you can connect a DSLR or astronomical camera directly to the Powermate optics. This converts the unit into a high-quality 4x teleconverter for planetary, lunar, or solar imaging.\u003c\/p\u003e\n\u003cp\u003eImagine using an 8\" SCT at its native 2000mm focal length. The 4x Powermate transforms it into an 8000mm (f\/40) planetary imaging instrument, perfectly scaled for capturing fine detail with modern high-speed video cameras. This versatility makes it a dual-purpose tool for both visual observers and dedicated astrophotographers.\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\u003eExperiencing Jupiter at 4x\u003c\/h3\u003e\n\u003cp\u003eConsider an 8-inch, f\/10 Schmidt-Cassegrain telescope on a night of steady seeing. Inserting a 24mm wide-field eyepiece yields a modest 83x magnification. Now, add the 4x Powermate. The magnification jumps to 332x, a power level where Jupiter resolves from a bright disk into a detailed globe.\u003c\/p\u003e\n\u003cp\u003eAs your eye settles, the image snaps into focus. The two main equatorial belts are no longer simple stripes but complex zones with internal swirls and festoons. You can clearly distinguish the color difference between the North and South Equatorial Belts, and with patience, you might spot smaller ovals and barges within the zones. The Great Red Spot, if visible, appears as a distinct, salmon-colored oval, not just a hint of color. This is the power of the Powermate: it unlocks the full resolving potential of your telescope on the solar system's most challenging targets.\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\u003eChoosing Your Magnification: Powermate vs. Barlow\u003c\/h3\u003e\n\u003cp\u003eThe Tele Vue lineup offers several magnification options, and choosing the right one depends on your telescope and goals.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. 2x Powermate:\u003c\/strong\u003e The 2x is a versatile, all-around performer suitable for most telescopes. The 4x is a specialist's tool, intended for when you need the maximum practical magnification your telescope and seeing conditions will allow. It is the right choice when the 2x simply doesn't provide enough image scale for small planetary disks or tiny planetary nebulae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Tele Vue Barlows:\u003c\/strong\u003e A Tele Vue Barlow is an excellent choice for visual use and is more compact. However, the Powermate's telecentric design gives it a distinct advantage for imaging and for use with complex, multi-element eyepieces, where it maintains the designed optical performance without introducing aberrations. The Powermate is the more flexible and optically pure solution, especially at this high 4x factor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA genuine limitation of the 4x Powermate is its sensitivity to atmospheric seeing. A 4x magnification factor will also amplify any turbulence in the air. This tool requires steady skies to deliver its best performance, and on nights of poor seeing, a lower-power amplifier like a 2x model may provide a more pleasing view.\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\"\u003eIs a 4x Powermate too much power for my telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor planetary viewing, a good rule of thumb for maximum useful magnification is 50x to 60x per inch of aperture. A 4x Powermate is ideal for 8\" or larger telescopes on nights of good seeing. For smaller scopes, it may exceed the useful magnification limit unless used for imaging where short exposures can \"freeze\" the seeing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the difference between a Powermate and a Barlow lens?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA Barlow lens diverges light, which can change an eyepiece's eye relief and introduce aberrations. A Powermate is a 4-element telecentric amplifier that keeps light rays parallel, preserving the eyepiece's native performance and providing a sharper image, especially for imaging and with wide-field eyepieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 4x Powermate for deep-sky observing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile possible, it's not its primary purpose. The 4x Powermate is designed for extreme high magnification on bright objects like the Moon and planets. For most deep-sky objects, which are faint and extended, you will want lower magnification to maintain a brighter image and a wider field of view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 4x Powermate work with my 1.25\" eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The 2\" Powermate includes a 2\" to 1.25\" adapter, allowing you to use all of your 1.25\" eyepieces securely. The brass clamp ring on the adapter ensures your smaller eyepiece barrels will not be scratched.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the 4x Powermate for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou will need the Tele Vue PMT-4201 T-Ring adapter. This adapter allows you to unthread the optical cell from the 2\" barrel and connect it directly to a camera-specific T-ring, creating a solid, threaded connection for high-magnification planetary imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the 4x Powermate require a lot of focuser in-travel or out-travel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 4x Powermate is nearly \"parfocal,\" meaning it requires very little refocusing when inserted into the optical train. This makes it easy to switch between observing with and without it during a session without major focuser adjustments.\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\u003eProduct SKU\u003c\/td\u003e\n\u003ctd\u003eTV-PMT-4201\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification Factor\u003c\/td\u003e\n\u003ctd\u003e4x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003e4-Element Pupillary Corrector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eFully Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e22 oz (1.38 lbs \/ 624 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e5.2\" (132 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Barrel Diameter\u003c\/td\u003e\n\u003ctd\u003e2.7\" (68.6 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece Holder\u003c\/td\u003e\n\u003ctd\u003eBrass Clamp Ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Threads\u003c\/td\u003e\n\u003ctd\u003eYes (2\")\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\"\u003eTele Vue 4x Powermate - 2\"\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\" to 1.25\" Eyepiece Adapter\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\"\u003eTop Dust Cap\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\"\u003eBottom Dust Cap\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\/Tele_Vue_4x_Powermate_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\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue 5-Year Limited Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"Default Title","offer_id":51223879909661,"sku":"TV-PMT-4201","price":396.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_4x_Powermate_2in_1.jpg?v=1777515018","url":"https:\/\/davidastro.com\/fr-eu\/products\/tele-vue-4x-powermate-2-inch","provider":"David Astro","version":"1.0","type":"link"}