I want to image it at only 300mm... I've calculated the field of view of my 70-200 F4L + 1.4 extender, and should be able to fit orion + horsehead + flame easily into one field of view....
in a couple of weeks I'll have an adapter to use my QHY8 with this lens combo, then I'll get all that Ha light my DSLR is cutting out..
BITING NAILS OFF WAITING FOR TOYS!!