I am new to digital having used film underwater for nearly 50 years. So this is a big, big change.
I used my new set-up in Bonaire for a couple of weeks and am pretty pleased with the results. A few random observations:
The switch to pure manual ( two Sb105's) from TTL, which I was dreading, was no big deal. Yes I messed up a few but got better at it over the holiday.
The big LCD is a good feature and just one quick glance was enough to know whether I had done everything right
Canon 5D viewfinder display is quite limited and more importantly illuminates rather weakly so is impossible to see when there is decent ambient light. I had to keep looking at the top deck display constantly so had to take my eye from the viefinder.
The Aquatica housing is very robust and gives me confidence. However, neither shutter nor aperture is available to the right hand while keeping a finger on the shutter.
I used a Sigma 50 macro (latest model) which proved to be excellent. Mine seems to be a very quiet and quick specimen. Also a Canon 100 macro which worked a treat and locked on easily. I also used a Canon 17/40 zoom which performed much better than I expected after everything I had read in this forum and elsewhere. I largely avoided using it at 17mm and also stopped down well. I used it both with and without a 2X dioptre and after a very quick look, can't really see any difference in results
I also found the centre focussing point of the 5D somewhat hard to see in the viewfinder. It is marked quite palely and is not distinctly different from the five or six around it. I missed quite a few shots by lining up with what I thought was the centre focussing point only to find when I half pressed the shutter that it was one of the peripheral ones. As I approach a subject I now keep continually half pressing. This all may be down to me and I suppose I will get used to it
The big plus to me was the quality of the files. I was astounded how good they are - they look like medium format film!
Jim Greenfield