Vixen VC200L Dépliant

 

 

 or call us Mon. - Fri. from 9 a.m. - 5 p.m. ET:  845 469 8660 

 

 

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The VC200L’s catadioptric optical system is 
one of the most sophisticated optical designs 
available on the market today. With its 

unique VISAC (Vixen Sixth-Order Aspheric 
Cassegrain) primary mirror, the optical 
system is composed of a concave primary 
mirror, a convex secondary mirror and a 
three-element field corrector. Especially 
noteworthy is its sharpness and flatness at 

the edge, which far exceeds that of Schmidt-
Cassegrain systems of the same aperture. It 
provides a pinpoint star image of less than 
15 microns, even at the edge of its 42mm 
image circle. The open tube design eliminates 
the dew problem that is common with 
conventional Schmidt-Cassegrain systems 

and its size makes it very easy to handle.  

 

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The VC200L is well suited for observation and 
astrophotography of the moon, planets, star 
clusters, nebulae and comets. The rack-and-
pinion focusing mount accepts optional 2” 
eyepieces and accessories, and an f/6.4 

reducer for photographic use is available. 

 

“Owners comment that the VC200L yields flat, 

distortion-free images from edge to edge thanks 
to the corrector lens, while spherical aberration is 

minimized thanks to the aspheric primary mirror. 
The result is pinpoint stars from edge to edge, an 

important consideration for through-the-
telescope photography.” 
— Star Ware, 3rd edition, pg.146  
 
“[C]atadioptric fans should take a close look at 
this scope, since it does offer a few advantages 
compared to your standard issue Schmidt-

Cassegrain. … . The build quality is much better 
than most mass-produced SCTs. The Vixen has a 

2" rack and pinion focuser, which eliminates the 
primary image shift in an SCT. Also, the scope is 

collimatable to an impressive degree … . Finally, 
there's no corrector plate to collect dew.” 

— Scopereviews.com, 12/16/2003 

 

VC200L Telescope Schematic Drawing 

Note special 3-element corrector in focus tube 

of this unique catadioptric design.

 

Of the common catadioptric telescopes, only the VISAC 

system solves spherical, coma and curvature of field. 

Telescope Types  Spherical 

Coma 

of Field 

Classical Cassegrain 

Corrected 

L

L 

Dall-Kirkham 

Corrected 

L 

L 

Ritchy-Chretien 

Corrected 

Corrected 

L 

Schmidt-Cassegrain 

Corrected 

L

 

L 

 

 

 

 

 

200mm/7.9” @ f/9