{"title":"TeleVue Paracorr Coma Correctors","description":"\u003cp\u003eTeleVue Paracorr coma correctors remove the coma that makes stars look like comets near the edge of the field in fast Newtonian telescopes and Dobsonians. The Paracorr Type 2 uses a tunable top so correction can be matched to each eyepiece, and it also works for imaging.\u003c\/p\u003e\u003cp\u003eThe Big Paracorr Type 2 is a larger version for bigger focusers and wider fields, suited to large Dobsonians and imaging Newtonians.\u003c\/p\u003e","products":[{"product_id":"tele-vue-paracorr-type-2","title":"Tele Vue Paracorr Type 2","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eCorrects Coma in Fast Newtonian Reflectors\u003c\/li\u003e\n\u003cli\u003eFor f-ratios as fast as f\/3\u003c\/li\u003e\n\u003cli\u003e1.15x Magnification Factor\u003c\/li\u003e\n\u003cli\u003eAdjustable \"Tunable Top\" for Eyepiece Optimization\u003c\/li\u003e\n\u003cli\u003e4-Element, Multi-Coated Optics\u003c\/li\u003e\n\u003cli\u003e2-inch Barrel with Filter Threads\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\u003eManual\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\u003ePinpoint Stars to the Edge of Your View\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Paracorr Type 2 is a universal coma corrector for fast Newtonian reflectors, designed to transform distorted, comet-shaped stars at the edge of the field into sharp, clean points. By inserting this device into your 2-inch focuser, you enable your fast-focal-ratio mirror to deliver the wide, sharp fields it was designed to produce, effectively upgrading the performance of your entire optical 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\u003eThe Physics of a Perfect Starfield\u003c\/h3\u003e\n\u003cp\u003eOwners of fast Dobsonians and imaging Newtonians (typically f\/5 or faster) are familiar with coma, an inherent optical aberration where off-axis stars appear as distracting, comet-like flares. The Paracorr Type 2 employs a specialized 4-element, multi-coated lens system that intercepts and reshapes the telescope's converging light cone. This correction restores aberrated stars to the pinpoint dots you see at the center of the field, allowing you to experience the full, immersive potential of your wide-field eyepieces.\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\u003eOptimize for Every Eyepiece with the Tunable Top\u003c\/h3\u003e\n\u003cp\u003eNot all eyepieces are built alike; the location of their field stop varies by design and focal length. The Paracorr's ingenious \"Tunable Top\" is the key to universal compatibility. This adjustable mechanism lets you dial in the precise spacing between the Paracorr's lenses and your eyepiece's focal plane, ensuring the correction is perfectly optimized for any 1.25-inch or 2-inch eyepiece you own. The result is consistently sharp performance across your entire collection, from a low-power Nagler to a high-power Delos.\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 1.15x Magnification Trade-Off\u003c\/h3\u003e\n\u003cp\u003eTo achieve its level of correction, the Paracorr Type 2 introduces a minor, 1.15x increase to your telescope's magnification and focal length. This is a fundamental part of the optical design and a necessary trade-off for eliminating coma. This slight power increase also darkens the sky background, which can improve contrast on faint deep-sky objects like galactic dust lanes and the outer wisps of nebulae, often making the trade-off a net benefit for visual observers.\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 Critical Tool for Visual and Imaging Setups\u003c\/h3\u003e\n\u003cp\u003eThe Paracorr Type 2 is engineered for both the human eye and the camera sensor. For visual observers, it delivers expansive, \"spacewalk\" views where star clusters resolve into glittering dust across the entire field. For astrophotographers using sensors up to APS-C size, it produces a flat, corrected field essential for creating professional-quality images. By removing the Tunable Top, the Paracorr connects to standard imaging adapters to achieve the 55mm back focus common to most cameras.\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\u003eSeamless Integration Into Your Workflow\u003c\/h3\u003e\n\u003cp\u003eDesigned for practical use in the field, the Paracorr Type 2 slides into any standard 2-inch focuser and features a non-marring brass clamp ring to secure your eyepieces. The barrel is threaded to accept standard 2-inch filters, a significant convenience that allows you to add a nebula or light pollution filter to the corrector itself. This means you can switch eyepieces without having to thread and unthread your filter each time, saving valuable time under dark skies.\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 View from an f\/4 Dobsonian\u003c\/h3\u003e\n\u003cp\u003eCenter the Andromeda Galaxy in a wide-field eyepiece with an f\/4 Newtonian, and the core is brilliant. But without correction, the outer star fields dissolve into a swirl of seagull-shaped stars. Now, add the Paracorr. As your eye adapts, the view transforms. The outer third of the field snaps into focus, revealing countless individual stars in M32 and NGC 205 as sharp, distinct points. The experience is no longer just about the galaxy's core, but about its full, majestic context in a perfectly rendered starfield.\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 Paracorr: Type 2 vs. Big Paracorr\u003c\/h3\u003e\n\u003cp\u003eTele Vue offers two main Paracorr models, and the choice is determined by your telescope's hardware and intended use.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eParacorr Type 2 (this model):\u003c\/strong\u003e This is the standard for visual observers and imagers using telescopes with 2-inch focusers. It provides excellent correction for eyepieces and camera sensors up to APS-C format (approx. 30mm diagonal). If your scope has a 2-inch focuser, this is the correct choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBig Paracorr Type 2:\u003c\/strong\u003e This model is designed for large, professional-grade instruments with 3-inch focusers. It offers a larger corrected field to illuminate full-frame sensors (43mm diagonal) and beyond. The Big Paracorr is the right choice only if you have a 3-inch or larger focuser and are using very large imaging sensors.\u003c\/li\u003e\n\u003c\/ul\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\"\u003eDo I need a Paracorr for my f\/6 or f\/8 telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. Coma becomes visually apparent in telescopes faster than f\/6. For f\/6 and slower systems, the effect is typically minimal and a coma corrector is not necessary for visual use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Paracorr Type 2 work with all my eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, that is the purpose of the \"Tunable Top.\" By adjusting the height setting according to the included chart, you can optimize the Paracorr's performance for virtually any 1.25\" or 2\" eyepiece, from Plössls to ultra-wide Naglers and Ethos.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 1.15x magnification affect my views?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou must account for it when calculating magnification. For example, a 10mm eyepiece in a 1000mm focal length telescope normally yields 100x. With the Paracorr, the effective focal length becomes 1150mm (1000 x 1.15), yielding 115x. This also slightly darkens the sky background, which can enhance contrast on faint objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Paracorr Type 2 good for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is excellent for imaging with fast Newtonians. It provides a well-corrected field for camera sensors up to APS-C size. For full-frame sensors, the Big Paracorr Type 2 is recommended to avoid vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need to re-focus after inserting the Paracorr?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Paracorr slightly changes the focal point of the telescope, requiring minor re-focusing. It is designed to minimize the change, but some adjustment will be needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between the Paracorr Type 1 and Type 2?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Type 2 is a more advanced design that offers better correction, especially at very fast f-ratios like f\/3 and f\/3.5. It also features the Tunable Top for better eyepiece optimization, which the original Type 1 lacked.\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 Number\u003c\/td\u003e\n\u003ctd\u003eVIP-2010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eComa Corrector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e2-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification Factor\u003c\/td\u003e\n\u003ctd\u003e1.15x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003e4 elements, multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eNewtonian reflectors down to f\/3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.1 lbs \/ 17.6 oz \/ 499g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e4.25\" \/ 108mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Support\u003c\/td\u003e\n\u003ctd\u003eThreads for 2-inch filters\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 Paracorr Type 2 Coma Corrector\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\"\u003e1.25\" 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\"\u003eEyepiece Dust Cap (Top)\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\"\u003eBarrel Dust Cap (Bottom)\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_Paracorr_Type_2_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":51223879614749,"sku":"TV-VIP-2010","price":808.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Paracorr_Type_2_1.jpg?v=1777515028"},{"product_id":"tele-vue-big-paracorr-type-2","title":"Tele Vue Big Paracorr Type 2","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eCorrects Coma in Newtonian Reflectors\u003c\/li\u003e\n\u003cli\u003eFor f\/3 to f\/6 Parabolic Mirrors\u003c\/li\u003e\n\u003cli\u003e1.15x Magnification Factor\u003c\/li\u003e\n\u003cli\u003eDesigned for 3-inch Focusers\u003c\/li\u003e\n\u003cli\u003ePrevents Vignetting on Large Sensors\u003c\/li\u003e\n\u003cli\u003eAdjustable \"Tunable Top\" for Optimization\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\u003eManual\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\u003ePinpoint Stars to the Edge of Full-Frame Sensors\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Big Paracorr Type 2 is a specialized optical corrector designed to solve one fundamental problem: the comatic aberration inherent in fast Newtonian reflectors. For astro-imagers using large sensors or visual observers with ultra-wide eyepieces, this device transforms distorted, comet-shaped stars at the edge of the field into sharp, round pinpoints, effectively making your mirror's full potential visible from corner to corner.\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 Physics of a Flawless Field\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the Big Paracorr is a multi-element, high-index glass optical system engineered to counteract the physics of a parabolic mirror. Mirrors faster than f\/6 naturally produce coma, an aberration that elongates stars as you move away from the central axis. The Paracorr's lenses introduce an equal but opposite correction, ensuring light rays from across the entire field come to a sharp, symmetrical focus on your camera sensor or at the eyepiece.\u003c\/p\u003e\n\u003cp\u003eThe visual result is a radical improvement in edge-of-field performance. On a full-frame image of a dense star field like the Perseus Double Cluster, stars that would appear as distracting seagulls or crescents become tight, point-like sources. This allows you to use the entire frame for your composition, no longer needing to crop away the distorted outer third of your images.\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\u003eEngineered for Large-Format Illumination\u003c\/h3\u003e\n\u003cp\u003eThe \"Big\" in Big Paracorr is a direct reference to its 3-inch barrel format. This larger diameter is not for vanity; it is a mechanical necessity for illuminating sensors with diagonals of 43mm (full-frame) or larger without vignetting. A standard 2-inch corrector would cause the image brightness to fall off dramatically in the corners of a large sensor, but the Big Paracorr's wide body and oversized lenses provide an even, un-clipped light cone.\u003c\/p\u003e\n\u003cp\u003eThis makes it the right choice for imagers who have invested in full-frame DSLR, mirrorless, or dedicated astronomy cameras. It ensures that your flat frames are correcting for minor dust and gradients, not for a fundamental vignetting issue caused by an undersized corrector. The result is higher signal-to-noise in the corners and a more uniform final image.\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\u003eDialing in Perfection with the Tunable Top\u003c\/h3\u003e\n\u003cp\u003eOptimal coma correction depends on the precise distance between the Paracorr's lenses and the focal plane. The Big Paracorr's \"Tunable Top\" is a calibrated, adjustable mechanism that lets you dial in this exact distance for your specific eyepiece or camera. By simply loosening a collar and rotating the top, you can match the setting to your equipment, ensuring the best possible correction.\u003c\/p\u003e\n\u003cp\u003eThis eliminates guesswork and provides a repeatable, optimized setup. For an imager, it means you can set the back focus correctly for your specific camera and filter wheel combination. For a visual observer switching between different eyepieces, it allows for quick tweaks to maintain edge-to-edge sharpness across your entire collection.\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\u003eMore Than a Corrector: The 1.15x Magnification Factor\u003c\/h3\u003e\n\u003cp\u003eThe Paracorr's design includes a slight 1.15x magnification factor. This is an integral part of how the 4-element lens system achieves its correction and should not be mistaken for a simple Barlow effect. This minor focal length increase has a secondary benefit: it slightly darkens the sky background, which can increase the contrast on faint, extended objects like galaxies and nebulae.\u003c\/p\u003e\n\u003cp\u003eThis also means your f\/4 mirror performs like an f\/4.6 system, which can make collimation slightly more forgiving. It’s a subtle but meaningful characteristic that contributes to the overall quality of the final view or image, turning your fast, wide-field instrument into a perfectly corrected, high-contrast 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\u003eSecure Connections for Heavy Payloads\u003c\/h3\u003e\n\u003cp\u003eRecognizing that large-format imaging involves heavy camera trains, the Big Paracorr uses threaded connections instead of simple compression rings. The back of the unit provides a 3.40\" x 24 TPI flange for attaching robust, dedicated camera adapters. This prevents any tilt or flexure that could compromise the optical correction, a critical factor when dealing with the tight tolerances of a fast optical system.\u003c\/p\u003e\n\u003cp\u003eThe primary limitation of the Big Paracorr is its requirement for a robust, 3-inch focuser and a mount capable of handling the entire imaging payload. It is a serious piece of hardware for those who require the highest level of performance from their large-aperture Newtonian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch3\u003eChoosing Your Paracorr: Big vs. Standard Type 2\u003c\/h3\u003e\n\u003cp\u003eTele Vue offers two versions of the Paracorr Type 2, and the choice is dictated by your equipment and goals.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBig Paracorr Type 2 (this model):\u003c\/strong\u003e This is the definitive choice for imagers using sensors with a diagonal larger than 30mm (i.e., APS-C and full-frame) or visual observers using the widest 2-inch eyepieces like the Tele Vue 31mm Nagler or 21mm Ethos. It requires a 3-inch focuser to deliver its vignette-free performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParacorr Type 2 (VIP-2010):\u003c\/strong\u003e The standard 2-inch model is optically identical and provides the same level of coma correction. It is the ideal choice for telescopes with 2-inch focusers, for visual use with most eyepieces, and for imaging with cameras that have APS-C or smaller sensors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf your system can accommodate it, the Big Paracorr provides the ultimate, uncompromised illumination for the largest formats. If you use a 2-inch focuser, the standard Paracorr Type 2 delivers the same world-class coma correction in a smaller package.\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\"\u003eDo I need the Big Paracorr or the standard 2-inch Paracorr Type 2?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eChoose the Big Paracorr if you have a 3-inch focuser and use a full-frame (43mm diagonal) or larger imaging sensor. For telescopes with 2-inch focusers or if you primarily use smaller sensors (APS-C or smaller), the standard 2-inch Paracorr Type 2 is the correct choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Big Paracorr work visually with my 2-inch eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but you will need a 3-inch to 2-inch adapter to place your eyepiece in the Paracorr's tunable top. It is particularly effective with ultra-wide 2-inch eyepieces that can take advantage of the large, fully illuminated field it provides.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I set the correct \"Tunable Top\" position for my camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTele Vue provides charts and adapters for various camera systems. The goal is to set the Paracorr's lens-to-sensor distance to a specific value (typically around 80mm from the rear thread shoulder). You use a combination of the tunable top setting and appropriate spacers to achieve this distance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the 1.15x magnification change my f\/ratio?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it effectively multiplies your telescope's focal ratio by 1.15. For example, an f\/4 telescope will perform like an f\/4.6 system with the Paracorr. This is an integral part of the optical design that achieves the coma correction.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use 2-inch filters with the Big Paracorr?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but you will need a camera adapter that has M48 (2-inch) filter threads. The Paracorr itself does not have filter threads on the eyepiece\/camera side, but compatible adapters from Tele Vue and other manufacturers do.\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 Number\u003c\/td\u003e\n\u003ctd\u003eVIP-3010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrel Size\u003c\/td\u003e\n\u003ctd\u003e3-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification Factor\u003c\/td\u003e\n\u003ctd\u003e1.15x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Elements\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimal Mirror f\/ratio\u003c\/td\u003e\n\u003ctd\u003ef\/3 to f\/6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Side Connection\u003c\/td\u003e\n\u003ctd\u003e3-inch Barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera\/Eyepiece Side Connection\u003c\/td\u003e\n\u003ctd\u003e3.40\" x 24 TPI Flange (80mm back focus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.5 lbs (0.68 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e5.125 inches (130 mm)\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\u003cimg class=\"DAV-img-box\" alt=\"Tele Vue Big Paracorr Type 2\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/TV-VIP-3010_1.jpg?v=1794301550\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue Big Paracorr Type 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\u003cimg class=\"DAV-img-box\" alt=\"Tele Vue 3-inch Dust Cap\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/TeleVue-3inch-Dustcap.jpg?v=1794301666\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDust Cap (Top)\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\u003cimg class=\"DAV-img-box\" alt=\"Tele Vue Dust Cap\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/TeleVue-Dust-Cap-Bottom.jpg?v=1794301740\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDust Cap (Bottom)\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_Big_Paracorr_Type_2_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":51223879647517,"sku":"TV-VIP-3010","price":1754.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele_Vue_Big_Paracorr_Type_2_1.jpg?v=1777515019"}],"url":"https:\/\/davidastro.com\/collections\/televue-paracorr-coma-correctors.oembed","provider":"David Astro","version":"1.0","type":"link"}