Quote:
Originally Posted by UniPol
I think the Model 129 (Alt/Az) and Model 131(Eq) were the best all round versions in their time. Not too heavy, excellent optics, beautifully made and easy to transport. It was the only model in Polarex/Unitron's line up which was F16, all the other versions were F15. Back when, 3" refractors were considered an ideal size for most amateurs. Coupled with modern 1.25" eyepieces their performance is quite satisfying.
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Yes, the 3" exceeds the Condrady standard (of 5 focal lengths per inch to reduce CA), which makes it a good telescope for planets and doubles.
Funny thing though, I used to dream of having the 5", which I am guessing would have shown much more CA. The Unitrons did not scale up well and all F15s are not equal.