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| p.1 #13 · OT - New Sigma 18-135 F1.8 makes 7D tempting :) |
I think the DOF comes secondary to the fact that you get 1 1/3 stops of additional light in a zoom lens!!
But it's not that simple, full frame captures about 1.3 stops more total light for the same aperture and therefore the same sensor generation and technology the full frame will have high ISO performance 1.3 stops better than crop. So it's all moot.
In fact, f1.8 can be restrictive in bright daylight, and can require you to carry NDs to get the same DOF as a full frame at f2.8.
D. Diggler wrote:
I just added a new crop sensor camera to my toolbox for the times I want deeper depth of field.
Size of the camera wasn't a consideration at all in the purchasing decision. I also have other crop sensor cameras I use when I want the added reach.
You can get the same DOF and image quality by stopping down another 1.3 stops and upping the ISO 1.3 stops on a full frame. Unless you're already maxing out the aperture at f16, f22, etc, I don't see the point. "Reach" is totally valid, as 24mp on DX does get more pixels on a distant subject than 36mp on FX, not a priority for me, but understandable.