Re: please ignore doing sharpness check
barry
I understand what you are getting at believe me.
Lets put it this way
Looking out of a window at home, if you never clean it you can still see through it, but not as well as when it gets cleaned.
Same with this camera lens, It has been used on every outing, and the inner part of the lens moves in/out of the outer casing as you alter the distance settings. Eventually it draws in a little dust which settles inside, not noticable until it gets cleaned by professionals. then is when a picture looks shall we say "Cleaner/clearer" to the owner. Even Sue notices the difference on the original
Hope that explains what I am saying
mags
Bless you. Initially it was for my own information from original photo to one on a forum I was trying out to see how the internet affected the photo. Me being over fussy I suppose
if you can and want to take of the please ignore bit