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As with most things optical there are pros and cons - I have had the Kunming 25x100 IF versions on a very HD mount - that luckily I got cheaply on my local 'E bay' type site.
I do love mine - you get a bright 3D effect that is relaxing to use - using 2x eyes I can view for hours without eye strain.
The 'immeadiacy' when viewing bright star clustes like M6, M7 and the area around Sagittarius / Scorpius etc. is amazing and accounts for some of my best viewing in 35 years of observing.
CA - as houghy noted is there on bright objects [ they are 2x short tube achros after all ] - but personally I find it does not detract from the viewing.
Neck strain of course and the heavy duty tripod which is required for the beast are issues. The other negative is having a fixed power 'only'.
The positives for me far out weight the negatives - would I sell them - never - do I use it more then my GSO F/4 8in. on DSOs - yes.
The only thing better would be the 45 degree variety with changeable eyepieces - observing nivana but unhappy bank manager [and wife].
Last edited by chris lewis; 26-11-2007 at 12:55 PM.
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