wow, nice shot! Those are the type of shots I want to start getting.


So thanks for the explanation - I think it makes perfect sense now - it's the length of the lens, which I completely ignored while trying to figure it out on my own. I forgot that the MFD is from the sensor to the subject - duh.


So the minimum focus distance is always going to be greater than the minimum working distance - because of the lens barrel. Got it. Thank you!


One thing I don't get though is - why did you specify 1:1 magnification? Doesn't this formula hold true for different magnifications?


sorry if that opens up a whole different discussion that you'd rather not get into. Magnification numbers like 1:1 are easy - subject is life size on the sensor - but magnifications like 1:5.8 (the mag spec for the 70-200 2.8) baffle me.


Thanks again for your help - I'm looking forward to buying one of the macros tomorrow!