Hi Wulfgar , I have a 5 inch f/13 reflector ( 1710mm ) I built in NZ many years ago and she has a 3/4 inch diagonal and on the moon and the planets the only scope that comes close and its my Takahashi Mewlon 210 ( 2410mm ) , a long focal length reflector's are very special .
Here is a photo of my 5 inch ( Goldie )
Brian.
Quote:
Originally Posted by wulfgar
I have a suspicion Vixen source optics from a multitude of makers and perhaps only re-figure at best. There's nothing wrong with a fast Newtonian, other than coma which can be corrected. Or the larger obstruction than reduces contrast and limits them as regard planets and double stars.
But I like planets and double stars, so my 6" F8 Newt has only a 1 inch secondary. That 6" scope certainly splits double stars way better than a 4" Vixen fluorite. But because there is still an obstruction the images are "softer" than in the fluorite.
It is a fact that exceptionally fine optics can make up for some of the loss of contrast by obstruction.
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