C6-RGT 6" Refractor by celestron (anyone used/looked through)

[Astroman (Andrew Wall)]

Has anyone used or looked through one of these telescopes? If so what are our thoughts on it?

[mick pinner]

l have the Skywatcher 152mm which is the same as the Celestron and find it very good although it has had little use, there seems to be a big difference between how much colour fringing one scope has compared to another, mine shows very little colour and with a VR-1 filter it all but dissapears, mine also had a very good rack and pinion focuser as standard although l have fitted a Crayford.
They are a very big refractor and do need a big mount to carry them, they have a collimatable front cell which is a big advantage, overall l think a good scope.

[[1ponders] (Paul)]

I had the chance to compare this scope to my 4" version for a couple of weeks a few months ago. Apart what mick has mentioned about the size and mount requirements I would certainly take note of what he said about the differences in colour fringing. I found that compare to my 4" the 6" wasn't corrected as well for chromatic aberration. Compared side by side on the moon there was considerably more chromatic aberration with the 6".