Why does the Fuji 23/1.4 have the effective DOF of a 35/2.8?

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David McGaughey
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Why does the Fuji 23/1.4 have the effective DOF of a 35/2.8?
7 months ago

Mathematically/optically/physically, the 23/1.4 should have the effective DOF of around a 35/2.1 on a full-frame system.

But in practice, it seems to be closer to a 35/2.8.

Steve Huff did a quick comparison between the 23/1.4 on an X-E2 and the 35/2.8 on a Sony A7. They look virtually identical.

http://www.stevehuffphoto.com/2014/01/21/24-hours-with-the-fuji-x-e2-and-23-1-4-a-quick-review-by-steve-huff/

avanbeek/Andrew VanBeek did a comparison between the 23/1.4 on an X-E2 and the 35/1.4 on a Canon 5DIII. The 35/1.4 stopped down to f/2 on the 5DIII had substantially less DOF.

http://andrewvanbeek.com/fuji-x-lenses-and-full-frame/

So, why is this?

Canon EOS 5D Mark III Fujifilm X-E2 Sony Alpha 7
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