I have just returned from a refreshing break in Dorset, southern England, where I took a number of shots with the A900 and (mainly) the Zeiss 24-70mm F2.8. I wnet all out on a few shots and I have processed a few favourites, two of which I append below
The first image was taken last Monday at sunset in Kimmeridge Bay as the tide was coming in and the clouds were gathering. Technincal details are Sony A900 at ISO 100, Zeiss 24-70mm at 24mm and F/18, Lee ND .6 grad and linear polariser, 1/2 sec exposure, processed in DxO and Photoshop CS4. Sometime during the course of this shot, my PDA went swimming with the fishes :
The second image was taken 6 days later near the same spot, at about 5:45am, as before except F/20 and 3.5 secs exposure.
So how did the A900 fare? Well I also took the Mamiya ZD with me but never took it out of its bag. Stopped down to F18 to F22 at 24mm and using hyperfocal focusing, front to back sharp images are not too much of a problem; a bigger problem was mirror bounce affecting sharpness. I could not use mirror lock-up easily as I don't have the remote electornic cable release. I freqently used the remote "commander" just for hands-off shooting on a tripod. Not ideal, but it proved to be the best compromise. I am pleased to report that the Zeiss 24-70mm held up well down to F22 in trms of sharpness, better in fact than the 35mm Mamiya Wide angle.