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gso 8 cc or c8edge or c925?for planetary observing

planet observing
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#26 JP-Astro

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Posted 04 June 2021 - 07:14 AM

My CC8 f/12 for visual use shows no coma - zero - down to a 56mm 52’ eyepiece.

What about other fine qualities if any? Not mechanical/construction - just the image quality and possible comparison to any of your favorite scopes?



#27 WWFSMD

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Posted 11 July 2021 - 03:42 PM

Jupiter snapshots taken with cell phone through C9.25 StarBright with Hyperion Mark IV Zoom at 8mm while the mount has not settled, no filter.

 

Visually it is much clearer & brighter, festoon swirls can be seen just like this 11" SCT sketch: http://skyandtelesco...Sketching-1.jpg

 

No sharpening, just adjusted exposure, contrast & brightness in good steady subtropical seeing:

 

IMG 20210712 033842
IMG 20210712 034255
IMG 20210712 034047
IMG 20210712 034205
IMG 20210712 034533
IMG 20210712 034356

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#28 pweiler

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Posted 25 July 2021 - 03:27 PM

I don't believe Classical Cassegrains have a flat field. They do have some advantages including faster cooling (open design), non moving primary mirror (reduces focus range, but eliminates mirror flop) and smaller Central Obstruction (an f16 is a more standard CC design with a 25% CO).


For visual, In the field use, my Orion cc8 is extremely flat in fact using an EP such as an ES 82’ you can even do what I call peering around the edge of the normal view and everything possible to see is still flat. No comparison to prior f/4.7 and f/8 newt reflectors owned.
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#29 WWFSMD

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Posted 29 July 2021 - 10:11 AM

With my old C9.25, level of details looked exactly like this visually (but brighter): https://www.youtube....h?v=o0_vsGO020M

 

Could GSO CC8 would any better? I wonder.




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