各位同好：
附圖所示guide mount體積雖然較大及重心較高，但虛位比其它相近價值的guide mount較小，同時亦較軋實，變形較小。能裝載鏡筒直徑最大至8cm折射鏡。
全新品。雖然購自日本多年，但從未用過。現售HK$400. 有興趣請給我PM或電話。
LT
Mizar guide mount
Mizar guide mount
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Unless the tracking accuracy (PE value) was very poor, guiding might not be necessary even upto hours for standard lenses, if good polar alignment done.XR250 寫:
guide mount好重要，有的時候，你未必覺，無的時候，就知有用！
我現在用vixen 60s+GA4，兩樣都有徵調, 真係好方便。
想問LT, vixen重有無出類似60s guide鏡？ 我想找枝大囗徑少少或焦距長少少的guide鏡，不過又想好似60s有build-in徵調。
I don't know the tracking performance of those china-made Vixen GP clone mounts, but heard that most of them show quite a large amount of PE values. For Vixen GP and other better mounts like Tak P2 series, EM series, Spaceboy, guiding is suggested for photographic f.l. 200mm.
For f.l. 200mm and 10-15 min exposure time, you might not need guiding for those mounts mentioned above. Of course, you have to polar align very accurate, less than 5 arc min.
That is my experience.
Vixen 60S guiding scope is a great design. I like the guiding bracket very much. Because it is very weight and low C.G. The scope itself is of very good quality. But very unfortunately, it was discontinued.
However, don't be disappointed. its brother 70S is still in production. 7cm F420mm specification. Chromatic abberration is of course a little bit more severe than 60S. But it can still work very well on guiding. In fact, I was using it on guiding 10" F4.7 Newtonian, before this telescope was sold to my friend.
Interested people may call me or send me PM for enquiry.
LT
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