My C80ED gives sharper and more contrasty images of planets, the Moon and double stars. The improvement is not subtle.
Yes, but the C80ED is one of those ultra-high-end, ED thingies.
I'm curious, though. Were you able to set both of them up, and do a side by side comparison? I used to own a 4" Vixen/Celestron scope, and yes, Jupiter was a good way to expose the scope's weaknesses.
One last thing: I finally broke down and bought a GSO focuser and adapter for the C80ED. It's marked as "out for delivery."
No, I never did a side by side comparison. But I know what to look for when viewing - or trying to view - fine surface features on planets and the Moon. And I have a good memory for what I've seen. I had the C4-R for about five years. It was at least as good as the C102GT, some would say better.
Jupiter is a good case in point. In both my C4-R and my C102GT, the limb of Jupiter and the belts had fuzzy edges due to smearing from CA. Obviously so. Also, finer surface detail such as festoons, the smaller belts, and barges and other mottling in the EQ belts were much easier to see and sharper in the C80ED.
To my eyes, the Moon just looks better through the C80ED. Sharper features, better perceived contrast. Especially when looking at features away from the terminator, the C80ED shows the lunar features with better contrast.
The better images for Jupiter and the Moon were obvious to me the first time I looked at those objects through the C80ED. It just is.
Yep, the GSO Crayford and adapter is an excellent upgrade for the C80ED. I remember that the adapter was out of stock for many years. When they finally came back, I grabbed one up fast!
Edited by Sarkikos, 24 July 2017 - 09:24 PM.