As this thread is about ZI, problems encountered and has been discussing focussing/alignment I have a question I'll ask here. As I was getting photo's that were disappointing where sharpness is concerned, I made a series of test shots using 3 camera bodies: ZI, VL-R3a, VL-R2. Lenses: VL90mm, VL75mm, VL50mm and VL35mm/1.7 . One shot with a Rollei 40mm. Shots made using a ruler, distance 1 meter to film plane, angle 30 degrees. Wide open. I will give focus as being back focus (+cm) or front focus (-cm). One photograph did not have enough resolution for interpretation, which was difficult for the 35mm in all cases.
ZI VL90 +4 VL75 +4 VL50 +5 VL 35 +2 Rollei40 +5
R3a VL90 -2 VL75-0,5 VL50 -4 VL35 -5
R2 VL90 +2,5 VL75 +3 VL50 +3 VL35 ?
Didn't put the Rollei on the other camera's, because they then won't fit on my tripod.
Obviously rangefinder adjustment is not the only variable. The lens cam is another, but the ZI and R2 are reasonably consistent with all lenses. The R3a is not, which brings me to the last variables: human error in focussing and interpretation. Can't think of another explanation.
However, to get to the ZI, this seems to have the biggest error of the three. Now to my question: Has anyone else done this kind of testing and what were your results? What should be considered tolerable error? Less than what I'm getting I should guess; focus on the eyes and get well focussed ears... (Don't respond to that, I know the distance is bigger than 4cm...)
By the way, I also made some shots with my Olympus OM40, with its own lenses ofcourse. Sorry to say that it won the contest, R3a second, R2 third and ZI last. Bought the ZI for supposedly improved focussing accuracy. Ouch.