lester_wareham

@ David. I qualified my comment by saying "with the same framing". I am currently shooting this lens with the 7D and 6D, so this is my observation. A subject you need 3x on for crop you may need to go to 5x on the full frame. Tbh result are not so different, but at lower magnifications the full frame has the edge. Of course managing the working distance and interference of your flash rig on the surroundings gets harder at high magnification. On the 6D I have done some sucsesfuly natural light work handheld up to about 3x, great for subjects like the Green Tiger Beetle where flash would have to be very heavily diffused to be acceptable.

Most of use photographing insects with this lens work handheld, normally with flash. A crop body or full frame is good, easier to get close in with a crop but full frame gives slightly better resolution at the same framing. For flash I would avoid ring flash due to the ring reflections this causes. Better options are the twin flash (expensive) or a conventional flash with a bracket and hot shoe cable. Searches will turn up examples of the latter. For good results flash diffusion is advisable, again searches should turn up examples. One hint for the camera is as you will be using flash it helps if you can adjust the flash exposure compensation without removing the camera from your eye. The less highly featured Canon bodies only permit the FEC adjustment using the monitor quick menu and don't indicate the setting in the viewfinder.

I wonder if we will see the f8 AF capability, that would be an improvement. Assuming the AF is similer to the 5D III this should be possible.

I just got one and can confirm there is no problem with the 7D AI servo, all recent lenses must have the new firmware. The lens seems to give good results and seem well constructed.

A bit of feed back on using DPP 4 compared to the current 3. I like lots of the new features but why not have copy and paste of settings implemented (greyed out) one has to go via save recipie to file and load from file, this does make it look half baked. Also update of files on return from the edit window is much slower, attempting to save too early results on lots of ding sounds and pop up warning windows of not being able to access the file. Also batch processing seems slower.

<p>So is there any position on if edits made on DPP 4.0 are backwards compatible with DPP 3.x?</p> <p>Ie I edit a file with 4.0, will DPP 3.x see the changes correctly?<br> I "assume" the reverse is true else it would be very bonkers, but I should probably ask that also?</p> <p> </p>