Speed booster confusion in DOF

Started Jun 6, 2013 | Discussions thread
Hye Regular Member • Posts: 405
Re: Speed booster confusion in DOF

kkx wrote:

I.e, I can use faster shutter because of the 1-stop of light increase, and the framing is the same as FF. But the DOF is aslo the same as FF.

There are a lot of "info" saying that the lens will be effectively f2.0 because of the light/speed increase of 1-stop. So I am confused.

I think the confusion is in trying to compare across different systems: your 100mm f/2.8 lens on APS-C *with* speed-booster performs like a 67mm f/2.0 lens on APS-C *without* speed-booster. This makes sense if you are comparing to other lenses mounted on APS-C and not to FF equivalents.

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