Quote:
Originally Posted by AlexN
I'd love to put an a7s on the back of my 300mm f/2.8.. Even with just my 450D it manages to get down to magnitude 13 in 1 minute. In dark skies with the a7s I'd imagine it would dig deep.
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I have used it on my 300mm F 3.8 in suburban skies it starts to 'white out' at 20 seconds. Lots of DBE needed to fix the pics.