Originally posted by fuf Why should the adjustment values be transmisible? Both the lens and body have their own tolerance levels and must be calibrated together. The same lens which focuses correctly with one body might misfocus horibly with another one. If you encounter this case you need to have calibrated the lens and all the bodies.
As for your second statement, as bodies have their certain tolerance limits so do the lens. Thus most lens should work with most bodies but in certain combinations misfocus can occur. The following article explains it quite well:
Variation Facts and Fallacies: Digital Photography Review .
Of course the adjustment values MUST be transmisible! If lenses are thrown on the market without calibration, and cameras are sold without the calibration done, we would have a good match in a million!
I have read that article previously, but the explanation doesn't satisfy me enough.
-It is much more cheaper to make equpiment with a wider tollerance and then write on it's chip ... +5, instead of aiming for perfection.
Camera will take the +5, add it to it's calibration, say -2, and adjust the focus to +3. (this happens when the microadj function is OFF)
-I'm not arguing that, in time, the equipment won't fall off it's initial calibration value. Then, the Microdajustment becomes usefull.
-Don't forget that the microadj. function comes from the factory tuned OFF.
-I don't pretend that ALL my problems with lenses are solved since turning the microadj. to OFF. Just the accuracy of the autofocus.
-I'm not going to say ALL new cameras owners should turn the function OFF. For me it worked, since most of my equipment is new, with little use.
Finally, how to explain that not only me but some other forum members got better results with their own lenses by turning the microadjustment OFF?
Last edited by octavmandru; 02-20-2012 at 05:42 AM.