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Equivalent lenses across formats

Full-frame equivalent 24–80mm f/5.6

Micro Four Thirds·17.3×13.0 mm·crop 2.00×·constant zoom·Ø 21.6 mm

Format Crop Focal length DOF aperture Equivalent lens DOF shift

Note: aperture equivalence is for depth of field and total-light comparisons, not exposure. f/2.8 still meters as f/2.8 on every format.

How this is calculated
Focal length target focal = source focal × source crop ÷ target crop
Depth-of-field aperture target f-number = source f-number × source crop ÷ target crop

Crop factor comes from the sensor diagonal relative to 36×24mm full frame. Different aspect ratios can make exact horizontal or vertical framing slightly different.

Similar lenses

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