Vixen VC200L 200mm Catadioptrical Reflector Telescope with GP2 Mount
VC200L Optical Tube
The VC 200L Reflector is an 8" f/9.0 highly corrected, highly specialized telescope for astro imaging. Vixen's unique catadioptric design features a high precision sixth order aspherical primary mirror, a convex secondary mirror and triplet corrector lens. VISAC is an abbreviation for Vixen's Six-Order Aspherical Cassegrain. The primary mirror is held by a retaining ring, instead of hooks, to decrease flare and enhance contrast.
The VISAC System provides high-definition star images to the edge of a wide viewing field and offers exceptionally outstanding performance in astrophotography. Even at the edge of the 35mm film format (larger CCD chips) stars are sharp (smaller than 15 micrometers). This is smaller than the resolution of fine quality CCD cameras, which means that the telescope does not limit the image quality. With its elaborate aspherical optical design, it achieves excellent image correction throughout the large illuminated field. (42mm diameter fully illuminated) Astronomy Technology Review states: "The VC200L focuser is one of the smoothest I've ever tested...overall the visual image quality of the VC200L was quite impressive...and is a step up from the typical Schmidt-Cassegrain". Telescopes.net will be happy to inspect and test the item before shipping at a fee.
The VISAC (Vixen's Sixth Order Aspherical Catadioptric) design achieves a photographic field virtually free of aberration. As coma spherical and curvature of field are perfectly corrected, images captured are stunningly sharped. Star images are less than 15 microns across to the very edge of the 42mm image circle. It is a telescope truly designed for both visual observation and astrophotography.
A comparison that shows extremely minute chromatic aberration, in very small five hundredth mm units, clearly shows that the aberration in the VISAC is far less than on the flourite refractor, which itself provides exceptional color correction.
Vixen's GPD2 Equatorial Mount
"Vixen has been making versions of the GP mount almost since the inception of the company.The original Polaris Mount, evolved through refinements to the Great Polaris Mount and now, with further refinements, is the GPD2 Mount. As with all versions, the GPD2 incorporates the same care and precision that is evident in all Vixen products. This includes 100% inspection and testing on the drive gears of all mounts.You can rest assured that when you purchase a GPD2 mount it is going to work right out of the box. To give you added assurance when this mount is purchased through an authorized Vixen Optics dealer, your 5 year warranty is included." Clear Skies, MrStarGuy.
The GPD2 equatorial mount is the stronger and heftier of the GP mounts. With its solid steel R. A. and Declination axes and brass worm gears, this mount will hold up to years of heavy use. In order to assure accurate tracking for astrophotography, the worm gears are especially machined to a very high precision that minimizes periodic error. The GPD2 Equatorial Mount is equipped with a polar axis scope with a built in variable intensity illuminator.