tashley
Subscriber Member
Alon, I have given it much thought: it is true that ensuring exact perpendicular alignment of sensor to subject is very difficult outside of a lab (pretty tough even in one!) but the interesting thing is that, were this the problem, I'd get some shots soft on one side and some soft on the other. This never happens. Hand-held or tripod, it is always the right. And the second shot clearly shows that at these distances and F5.6 there is ample DOF to cover such a small error should it be present. I align these pretty carefully but of course not perfectly, but the 'always on the right' nature of the issue is telling I believe... especially when taken in conjunction with the fact that no other lenses of the many I own in overlapping focal length range show this at all: If I had a natural tendency to angle the camera slightly 'off' it would show with other glass I think!