Originally Posted by mmodica
Not true, as I stated above (unless you think shallower DoF is an advantage for macro shooting). Let's take an example - EF 100mm f/2.8L Macro IS on crop vs. FF. At 1:1 magnification, you're at the MFD regardless of sensor size, so that's 30 cm (11.8") from the sensor. On the 7D at f/8, your DoF would be 1.8 mm, while on the 5DII at f/8, your DoF would be 2.9 mm (i.e. 1.6x deeper DoF with FF). Feel free to plug the numbers into DoF Master. Plus, as you state, you can stop down farther with FF before diffraction has an impact, plus you get a larger field of view. So, it's a triple advantage to FF for macro shooting.
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