I seldom check a lens's rear element for cleanliness. One of my recurring fears is that in the year 2030, I'll discover that on each of my lenses, the rear element has a big smudge that has been degrading my results for decades.
Pat White <[EMAIL PROTECTED]> wrote: "Or, to put it another way, putting any filter in front of the lens will cause _some_ image degradation (loss of contrast or sharpness). An SMC filter will cause the least degradation. In some instances, the difference is hardly visible, but for people to whom it matters, the few extra dollars are money well spent." [EMAIL PROTECTED]@verizon.net
