MFT 25mm f/1.4 fails to blur background like Full Frame 50mm lens @ f/2.8

Started Feb 16, 2014 | Discussions thread
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Fygaren Regular Member • Posts: 169
Re: MFT 25mm f/1.4 fails to blur background like Full Frame 50mm lens @ f/2.8

I assume he cropped only one picture to get them "equivalent", the E-M1. Shooting with 50mm FF and 25mm mFT the shooting distance will only be the same if the diagonal FoV is the same when FF uses 3:2 and the mFT uses 4:3, crop 1 and 2.

When cropping a crop 2 4:3 sensor to 3:2 you change the diagonal FoV so that the crop factor becomes 2.1

When cropping a crop 1 3:2 sensor to 4:3 you change the diagonal FoV so that the crop factor becomes 1.1

Comparing crop 1.1 to crop 2 is the same as comparing crop 1 to crop 1.85

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