Coma Corrector for Asi6200mm

ricardinho

Hi friends..

This year I acquired an Asi6200mm. I'm in trouble finding a 2-inch coma correcor for it. I compare it to other full frame cameras, like the 6d, and I acquired the Skywatcher quattro coma corrector, which works very well with the canon 6d (my scope is a quattro SW 10" f/4).

However, although the Asi6200mm's sensor is the same size than 6d, it appears to behave differently with coma corrections. There isn't wright correction. There are big comas and only a few space in the cente of the image is fine. As I already have filters and a two-inch filter wheel, I don't want to buy a 3-inch coma corrector and have to change everything, including the focuser one (too expensive). Could you help me please?

Thanks in advance

w7ay

ricardinho

Did you check if the ASI6200 is mounted with the correct back focus distance from the coma corrector?

Chen

ricardinho

I tested including with other coma corrections, like baader mpcc (very well with 6d) and baader Rcci.

ricardinho

The focus was normal in the centre of the image. I will check this...Thanks for the while..