A question to everyone:
I just worked out some distances as
I do have appreciable coma.
See a large 1 Mbyte version of the photo I posted to see the coma better:
http://i262.photobucket.com/albums/i...ched_large.jpg
some flickr photos of the image train are here:
http://www.flickr.com/photos/2471943...in/photostream
http://www.flickr.com/photos/2471943...in/photostream
I have in this order:
QHY9 camera , adaptor to filter wheel, filter wheel, TS9 9mm wide OAG & a Baader MPCC.
The distance from the output side of the coma corrector to the front face of the camera is about 65mm.
It looks as though this is too far because the coma corrector distance to the camera sensor chip should be 55mm - I think.
The camera face to sensor is 19mm – I think.
Therefore my coma corrector to sensor distance is 19 + 65 = 84mm.
That is 84 – 55 = 29 mm too much distance.
If I am right – it doesn’t look like my coma corrector can ever work?
Question:
Does anyone have a similar system that does work or
do they know what to do to make it work?