>It is the other way around. The cropped image has less DOF
>than the uncropped image (at same f-stop, same focal length,
>same subject distance). If you want to maintain a given DOF,
>then you will need to stop down the aperture, which usually
>means higher ISO (if you want to maintain you shutter speed),
>so less DOF for the cropped image.

Well... no. At least not unless I misunderstand your point.

For a given FIELD OF VIEW a cropped sensor on the same f-stop and focal length will have a different DOF than an FX sensor.

But if it's the same distance, f-stop, focal length, the actual in-focus area is the same whether the light falls on the cropped portion of the sensor or the whole sensor. Just think about it in post processing -- if you crop you don't change DOF, you just change field of view.


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