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

Started 7 months ago | Discussions thread
Steen Bay
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Re: MFT 25mm f/1.4 fails to blur background like Full Frame 50mm lens @ f/2.8
In reply to David Kieltyka, 7 months ago

David Kieltyka wrote:

Steen Bay wrote:

According to DxO the t-stop of the 25/1.4 on E-M1 is 1.7, but not quite clear whether that affects the DoF too.

It doesn't. DOF is affected by the actual aperture diaphragm diameter rather than the light transmission characteristics of the lens. I've observed this many times in actual use with fast lenses.

-Dave-

But what if the pixels can't 'see' the outer parts of a large aperture (because of 'pixel vignetting')?

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