Hi all,
I recently got a second hand 8" EdgeHD SCT as well as the 0.7x reducer. I have heard the EdgeHD has a great flat field without the reducer.
I got my first opportunity last night to give it a whirl with the 0.7x reducer on there and a full frame Canon 6D camera. I was taking shots in the middle of Sydney so the shots aren't great, but i was more testing the flatness of the field and the quality of the picture. Find attached an example shot. It does seem much flatter than my old C8 that i had but i expected it to be fully flat.
It looks like it still has a few issues with flatness. Can more learned people have a look at this photo and let me know if there are issues with coma or other issues with the FOV? Is there anything i can do to make my raw shots look better with rounder stars (collimation looked ok btw)? Should i be using the EdgeHD without the reducer to get a full flat field (but that limits what i can look at and makes tracking more difficult at the longer focal length)?
Image here (size was too bid for this site):
https://imgur.com/a/R1qqfkh
Any tips appreciated!!!!!
Cheers