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All Forums Category: General Numismatic Forums Forum: Coin Photography, Image Editing, and Related Software

Stacking: Doing It Right Or Wrong?

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austrokiwi
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 Posted 01/06/2014  07:17 am  Show Profile   Bookmark this reply Add austrokiwi to your friends list Get a Link to this Reply
Thank you I think I am getting it. How do I caculate the DLA for my sensor? I suspect what you will tell me will also highlight why the old Minolta MD 50mm macro does so well( apart from it having brilliant optics) on the A7r.
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rmpsrpms
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 Posted 01/06/2014  11:08 pm  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply
I usually just scale it from my T2i, which I know has DLA of f6.8 and pixel pitch of 4.3um. Your A7R has pixel pitch of 4.9um, so your DLA is 6.8*(4.9/4.3)=f7.8, so approximately f8. Keep in mind this is effective aperture, so depends on the magnification.
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