Hi, yea i know its kind of case to case basis and can be very subjective..
i dont mean any brand but rather referring to lenses as a whole..
whats the usual "life span" of a camera lens? erm say if i keep it in the in dry cabinet when i dont use.. i maintain it well...nv drop it nor getting it knock onto something before.. ( keeping and taking care of it in the "best" condition )
roughly how long can it work for me? especially some lens.. the better ones have USM, SSM etc.. when will it start to fail or die? Since its still a item by itself.. meaning there is no way it will last "forever" Any idea? or any experiences photographer have 1 that is still working after X years?
sorry..but im just curious.. cheers!