Originally Posted by
arthurking83
Well .. err, yes and no.
Technically, you get no difference in DOF no matter what lens, focal length or format is used once you get into macro photography!
The DOF for a macro image shot at 35mm will be the same as for that same macro shot used with a 200mm lens!
DOF at a specific magnification level will be the same no matter what camera, format or lens is used.
(at it's simplest explanation) the longer focal lengths will simply give you greater working distances(which can be an advantage, or not).
If you just want to 'get closer' with less cropping, then what WW describes can be useful(using a smaller format at close range for deeper DOF).
Personally, I found that the move to the larger 135mm format(from D300 to D800) has been a better experience for doing macro photography.
I can get more of the subject in the frame and/or higher magnifications than you can with a smaller format sensor.