Frogliza

On 20/04/2022 at 17:24, oymd said:

OVL OAG:

 

https://www.firstlightoptics.com/off-axis-guiders-oag/off-axis-guider.html

Hey oymd, this is an old thread but I wanted to ask if you get good stars to the edges of your FOV? I'm using a ZWO ASI294mc and NexStar 6SE and having a similar problem to your original post.

Did 105mm of backfocus work? 

On 14/04/2017 at 03:47, alexbb said:

I made some tests with various distances and, indeed, the results seem better with a shorter distance. I rechecked the collimation too and I tried to get it as close as possible, using the APT collimation aid tool this time. I couldn't take proper flats so I'll post the results later after I'll take them. There's also a possibility for some clear skies tonight.

Hey, this is a really old thread but I have had the same issue recently, did you find a good back focus distance to get round stars across the entire image?