Nikon D7100 1.3x crop & depth of field

Started Nov 22, 2013 | Discussions thread
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Nikon D7100 1.3x crop & depth of field
Nov 22, 2013

I did a search and I found some old threads but they seemed to be more theoretical rather than practical (they seemed to be before anyone actually had the D7100 in hand).

My question is this, if I use the D7100 in 1.3x crop mode do I have a larger depth of field than if I had an equivalent lens on the D7100 using the same aperture?

My reason for asking is whether or not the crop factor would allow one to shoot at larger aperture's (small f stop number) in order to increase shutter speed without getting a depth of field that is too thin (similar to what micro four thirds allows).  Let's leave out ISO for now.

Some quick math to get into the details and elaborate on my question:

D600 (full frame), 50mm f1.8, 10 foot distance = 1.29 DoF

D7100 (normal DX), 35mm f1.8 (35 x 1.5 = 52), 10 foot distance = 1.77 DoF

Any MFT, or D7100 + 1.3x:  25mm f1.8 (25 x 2 = 50), 10 foot distance = 2.63 DoF

That's a relevant increase in depth of field (DoF).  Enough that someone might have more confidence to shoot wide open without being "too thin".

But does it actually work this way?


Nikon D7100
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