天文一年级 发表于 2005-12-21 12:38

介绍一款VIXEN折反给大家

The VMC200L is a short tube optical system designed attaching importance to portability. The tube length is about 40cm only. Although its primry mirror is f/2.5, the compound optical system is f/9.75. It is a unique catadioptric optical system. By placing a meniscus corrector just before a secondary mirror, light is corrected twice on optical path.

D=200mm

F=1950mm-compound (f/9.75)

Multi-Coated Spherical Primary Mirror

GP-DX Equatorial Mount

Aluminum Tripod

31.7mm Eyepiece

Diagonal Prism

7x50mm Finder

木习习 发表于 2005-12-21 14:07

米呢???

ben33 发表于 2005-12-21 21:53

这个是折反?

seeksky893 发表于 2005-12-22 08:59

这不是卡镜么?副镜前边的那块透镜起什么做用?

Alone狼 发表于 2005-12-23 19:22

那是改正镜。。。。

我想我是狼 发表于 2005-12-23 19:59

:) ，好家伙 :twisted:

我想我是狼 发表于 2005-12-23 20:00

:) ，好家伙 :twisted:

seeksky893 发表于 2005-12-23 20:24

改正镜...........那简直是一定的.我想问的是它具体是改正什么的.....彗差?像散?场曲?

Alone狼 发表于 2005-12-23 20:37

应该是球差。。。。因为此镜的镜片都是球面的
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