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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Sigma 70-300 Macro (1 Viewer)

pdwinter

pdwinter

Paul Winter
If the enlargement ratio of the Sigma 70-300mm f4-5.6 APO Macro Super DG is 1:2 at 300mm is the ratio 1:3 at 200mm or is the maths more complicated than that?

Thanks, Paul
 
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