- Info about 130GTX + 0.72x QuadTCC + ASI6200
Re: Info about 130GTX + 0.72x QuadTCC + ASI6200
toggle quoted messageShow quoted text
Thank you for sharing this experience.
I just saw your images on Astrobin, wow!
I understand better what you say about the corner of the image.
Perhaps you can send me 1 fit picture (unique exposure of 180 sec foe exemple, in L channel.
I could really compare the shape of the stars on the whole image, and confirm that it is this level of result that I am looking for.
I have the 130GTX+QTCC+ASI6200MM. I tried very hard to get perfectly round stars at each of the four corners and after many nights of experimenting gave up after I got what I feel is close enough. I ended up with an optimal distance in my setup at 103.1mm. I also had 0.3mm M68 spacer rings that I used. I believe that the small pixel size of the ASI6200 and the large image area exposes any flaws in the imaging train. I believe there is a slight tilt in my system which I tried to correct with an M68 tilt adapter but this was a futile effort. With the current setup I get round stars in three corners but the fourth corner I do get triangles for stars at the edge and it is more noticeable if a larger star happens to be in this corner. With the field flattener stars are round across the image with the same spacing. I do love my 130GTX setup and the images are a joy.
Join firstname.lastname@example.org to automatically receive all group messages.