Explore Scientific Coma Corrector - First Light review

[AG Hybrid (Adrian)]

Well I did as you said Don. It was some hard work if I'm honest and quite dirty. Turns out Synta makes that part of the focuser out of aluminum. The pictures show the difference. Got all the in focus in the world now.

1# How it was to start with.
2# After the modification to the adapter.
3# Turns out I could remove the 2" adapter and thanks to the snug fit the HRCC sat in the draw tube nicely.

[Don Pensack]

I got to thinking about this, and though the HRCC can be held in the newly-modified focuser top ring (as in the 3rd photo), the length of the HRCC barrel supported this way will be small. Adding a heavy eyepiece could cause the HRCC and eyepiece to tilt off axis.
If the 2" adapter is used, the HRCC is supported along a much longer section of "tube", and while this doesn't get the maximum in travel, it may support the HRCC and eyepiece better.
After all, the modification made to the focuser ring shows a substantial in-travel was gained between picture 1 and picture 2.
Sorry my comment was 6 months later, but i was thinking about coma correctors and remembered this thread.

[AG Hybrid (Adrian)]

Originally Posted by Don Pensack

I got to thinking about this, and though the HRCC can be held in the newly-modified focuser top ring (as in the 3rd photo), the length of the HRCC barrel supported this way will be small. Adding a heavy eyepiece could cause the HRCC and eyepiece to tilt off axis.
If the 2" adapter is used, the HRCC is supported along a much longer section of "tube", and while this doesn't get the maximum in travel, it may support the HRCC and eyepiece better.
After all, the modification made to the focuser ring shows a substantial in-travel was gained between picture 1 and picture 2.
Sorry my comment was 6 months later, but i was thinking about coma correctors and remembered this thread.

This of course, is true. When I use it its at Picture 2. I have enough in focus for my 100 and 82 degree eyepiece. Not enough for my Delos and XW10 though. But, they do not even slightly need coma correction at f5 imo. The stars are pinpoint and flat all across the 70 degrees - at least to my eyes.

[bytor666]

Another reason why I wouldn't want to own a CC. Way too much fiddling. I just put in the eyepiece, re-center when needed and enjoy the views w/o worrying about coma or edges.....and I used to be a stickler for edges....not anymore!

There's too much out there to see to worry about aberrations, which is my own way of doing things....others such as yourself are different, which is ok.

Glad to see it worked out for you!!!

Cheers!