Continuation: Sensor Size, Present & Possibilities

Started Apr 10, 2013 | Discussions thread
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EinsteinsGhost
EinsteinsGhost OP Forum Pro • Posts: 11,977
On DOF

joejack951

Even if it is "most of the time" (and that's highly debatable) how is it an advantage to not be able to go more shallow with DOF as you can with full frame? There's nothing stopping you from stopping the lens down on full frame after all to get the same DOF as APS-C.

The FF advantage on shallower DOF is primarily at wide angles. The following image has no value but only to demonstrate DOF, which is barely "a fly deep":

Sony NEX-3 w/Sony 135mm f/2.8 STF

And that is APS-C. The same lens on 35mm sensor will actually have a deeper DoF due to a wider FoV.

But yes, there is nothing stopping one down from stopping down. In fact, stopping down is pretty much needed under most circumstances. I almost never shoot with a fast lens wide open but on rare occasions (usually, lighting):

Sony A55 w/Sony 35mm f/1.8 at f/1.8

That is comparable to 50mm f/2.8 on FF. And that takes us to another issue. Stopping down can sometimes necessitate higher ISO which would take away, most if not all, DR and noise advantage of FF.

Personally, I find APS-C as the best compromise between larger and smaller sensors. That is not to say that I don't see a point to FF.

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