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

Started 5 months ago | Discussions thread
David Kieltyka
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Re: A different comparison Redux...E-M1 AF glitch (grrrr...)
In reply to Fygaren, 4 months ago

Fygaren wrote:

If the lenses are exactly 50mm and 25mm, the 4:3 image should have a narrower horizontal AOV. As your uncropped pictures have the same horizontal AOV, you have had to step back when taking the 4:3 picture, given the focal lenght on both lenser are correct. This should give you less background blur. If you crop the 4:3 picture to 3:2 the pictures will be more or less the same, but the diagonal AOV on the 4:3 would be shorter making the crop factor about 2.1

Nope. The two pics were taken on a tripod in the exact same location. Note that the m43 "crop factor" is not precisely 2x...more like 1.85x. Also I have no idea whether the two lenses are exactly 25 & 50mm respectively. Historically Zeiss rangefinder "50s" have been around 53mm.

-Dave-

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