The Helios do have a pretty even surface detail, proms are not as bright as I have seen them in other Coronado scopes, I dont know what the filter is tunned to in the Helios. The image wasnt as bright as the newer PSTs but did resolve more detail becasue of the larger size though. Its a very different scope compared to the newer Coronados. I do like that everything is built into the scope, blocker and everythings all internal which is nice. The scopes 2" Helical focuser was nicer compared to that of the Coronado SM-90 scopes and I believe it was much better in build quality as far as the focsuer goes.
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Re: Coronado Helios 1 Telescope
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