Quote:
Originally Posted by wasyoungonce
You see I wouldn't have looked at this as AP recommends ...."This optic is not recommended for telescopes with f/ratios below about f9." 
edit:
also I noted the illumination circle, 30~34mm hows that go on a DSLR sensor illumination? |
I would not of thought so either but the GSO RC is an f8 while the 127mm is f7.5 both with flattish fields. The CCDT67 is proven with the GSO RC and so I thought although not recommended I was going to buy it for the GSO and it was worth a go on the 127mm.
It should cover a DSLR sensor as the QHY10 is a 10mp sensor and quite a large chip (23.6x15.8mm). The chip has a diameter of ~28mm. There was some vignetting in the raw frames but flats took that out. I calculated that the full chip would be fully covered if I took another 10mm from the imaging train. But that will have to wait for another clear night.