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Vixen - 200mm VC200L (f/9) Catadioptrical Reflector Optical Tube Assembly - DISCONTINUED

Model#: 5870

Discontinued Product

Manufactured by: Vixen

Details

This is a discontinued item. We recommend the Celestron EdgeHD 800 Optical Tube Assembly as a replacement.

Vixen VC200L 200mm Catadioptrical Reflector OTA


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.

vixen visac coatings chromatic aberration

visac vixen diagram cassegrain telescope

 

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.

 



Additional Information

Name Vixen - 200mm VC200L (f/9) Catadioptrical Reflector Optical Tube Assembly - DISCONTINUED
Manufacturer Vixen
Model 5870
Discountinued Yes
Aperture 200mm
Finderscope Optional
Focal Length 1800mm
Focal Ratio f/9
Focuser Dual Speed
Included Accessories Dove Tail Mounting Rail; Carry Handle
Light Gathering Power 816x
Limiting Stellar Magnitude 13.3
Optical Coatings Multi Coated
Optical Design VISAC Aspherical Mirror Reflector
Optical Tube Length 23.6” (600mm)
Optical Tube Weight 13.2 lb