Originally posted by CedrusMacro . . . the combination of sensor and processor on the digital cameras would affect the way the lens behaves?
I'd opine that's true but in many not so obvious ways. Perhaps not a change in the lens itself but in my perception of it -- the results one gets from it.
For instance, when shooting 'still life stuff' my digital habit is to grab at least 4-5 images of each 'pose'. Basic economics allows me to do that for free, something I wouldn't do with film because of the cost-per-shot factor -- both in $$ and time required in processing. Consequently, I'm much more likely to find a 'best' image from digital bodies (and instant histogram review?) than from film which will inevitably affect my opinion of the lens.
An unfortunate tradeoff is that I was more likely to spend quality time in precise preparation for each shot on film. Nevertheless, it's statistically likely that I'll find a better solution for micro-focus and camera movement issues with more images to choose from.
As a result, I'm likely to have a better (or worse!) opinion of a given lens with more comparable results to choose from even though it's optically the same lens in both cases. I do know I have more confidence in and affection for those lenses for which I have more digital images to compare.
My 30A is a good example. I progressed from a lens I liked to one that I knew WHY I liked it after much more experience shooting with digital bodies.
A few lenses fell out of favor for the same reason. As much as I liked the build and handling of my SP 180 (63B) I discovered I could duplicate the results at 180mm with the 30A. I still have the 30A.