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Moving into widefield astrophotography
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07-03-2012, 07:51 PM
Martin Pugh
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Join Date: Nov 2006
Location: Canberra, Australia
Posts: 1,339
Thanks again for the info, all v.useful. I will be testing at f2 and up this weekend.
I will have to research the designed backfocus distance between a Canon L lens and the EFS cameras (I have the 550D) and see how that differs.
cheres
Martin
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