Quote Originally Posted by Jon Ruyle


It may thus seem that crop cameras are better for extreme macro, but I don't find this to be the case: you can always crop a larger sensor, and usually it is diffraction rather than pixel density that limits resolution when you go way beyond 1x.

Jon, this is how I have thought to. I would prefer the 5D II over the crop body.


tkerr's statement that the"1.6 x 100mm = 160mm, a 100mm lens on a crop body is equal to a 160mm lens on a FF Body", isn't entirely accurate. I know he was referring to crop size.


A 100mm on a 1.6 will have a DOF greater by almost 1.6 than a 160mm would have on a full frame body at the same apertures.


Lately thoughDenise has been posting macros that appear to have a fairly deep DOF, I believe using her new 70mm.


It makes me wonder if there is a benefit to shorter focal lengths using crop bodies for macro, just to get the deeper DOF at equal crop sizes.


Otherwise to the original OP's questions, it sounds like so far the consensus is that the crop does not affect the mm.