EXCERPT page containing first few paragraphs. 2021-02-27 11:08:46
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For a general understanding of format equivalence, see Format-Equivalent Depth of Field and F-Stop.
Format equivalence* quick summary for the GF lens lineup:
23mm f/4 ~= 19mm f/3.3
30mm f/3.5 ~= 25mm f/2.9
45mm f/2.8 ~= 37mm f/2.3
50mm f/3.5 ~= 41mm f/2.9
63mm f/2.8 ~= 52mm f/2.3
80mm f/1.7 ~= 66mm f/1.4
110mm f/2 ~= 90mm f/1.6
120mm f/4 ~= 99mm f/3.3
250mm f/4 ~= 205mm f/3.3
32-64mm f/4 ~= 26mm - 53mm f/3.3
45-10mm f/4 ~= 37mm - 82mm f/3.3
* Versus 36.0 X 24.0 mm sensor. Nominal focal lengths as per specifications; actual focal lengths of real lenses are usually rounded. Equivalence based on long edge of frame.
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