full frame vs crop for macro

I am sorry to bring this question again - I know it was discussed before - But I can't find it.
So....
I know that the "conventional wisdom" has mentioned that for a given capture, the DOF of a certain shot is approx 1 stop "deeper" in a crop camera than a FF one - and the pixel density lends to easier cropping in a certain shot...
but then somewhere I read that this was overstated.
I am at the precipice of getting an MPE/MTEX combo and possibly getting a FF (haven't decided yet if that will be a 6D or a 5d3) and I was wondering if I understood the considerations correctly.

In my 1:1 and 2:1 macro shots - I use MF solely... so the AF system is less important (obviously). In my 1:2 and 1:4 + I do use AF though most often the center focal point.

For those of you doing macro 1:2-1:5 with FF - do you find a difference than with the crop cameras?

Many thanks

The DOF issue on FF cameras is rather overstated as with macro you tend to shoot at an aperture which balances DOF with Diffraction softening. With a FF camera you can shoot approx. 1 stop higher Fstop (ie smaller aperture) than a crop camera and get approx. the same DOF and diffraction balance.
I like the FF camera and MPE combo as obviously it allows you to shoot largish bugs at 1:1.
Can't comment on AF issues as I never use it.
Brian V.

Thanks Brian!
Do you find a difference between the crops and FF for your work?

ceriltheblade wrote in post #16677836
Thanks Brian!
Do you find a difference between the crops and FF for your work?

I did notice a big difference when I first got the 5Dmk2 vs the 40D I was using with noise and detail levels, think that has narrowed a bit with the more recent crop cameras though.
Brian V.

Just got a 6D and compared to the 7D there can be a big sharpness advantage at 1x to 2x but it is early days for me with the 6D.
I shot some springtails recently with both. I was working at 4x on the 7D and 5x on the 6D, the quality was very similar.
That is with flash, with ambient the 6D has about a 2 stop noise advantage, but I recon up to a stop of that will be lost due to needing more magnification.
I am waiting for the new season to find out the issues for sure.

Thanks for the comparisons. Supposedly there is a benefit in regards to the diffraction "border"
Have you found new tolerances for smaller apertures? That will be very interesting as you get more magnification. .. Did it make a practical difference (I.e. vs the balancing factor of the x1.6) besides the cleaner noise profile?

ceriltheblade wrote in post #16690633
Thanks for the comparisons. Supposedly there is a benefit in regards to the diffraction "border"
Have you found new tolerances for smaller apertures? That will be very interesting as you get more magnification. .. Did it make a practical difference (I.e. vs the balancing factor of the x1.6) besides the cleaner noise profile?

I did a maths analysis of this a while back, I think I concluded it didn't make an enormous difference in that respect.