Kostas asked: >Going a bit on a tangent. A mate took his N DSLR to the doctor to get >the sensor cleaned and was told that the N mount peppers the sensor >*every* time you change the lens.
>Has anybody noticed this on a N DSLR? On the *ist-D? I cleaned the first spot of noticeable dust off my company-issued D1h last month, after about 16,000 exposures and six months of use. Canned air did the job fine. I have yet to clean my D100 after about 6000 exposures. I change lenses a lot. I don't see any problem here (other than than that film doesn't have this problem at all...) You DO want to be careful when swapping lenses and such to minimize dust problems with DSLRs. A more likely problem, and one recently being addressed by Nikon, is that most zooms act as "dust pumps" bringing dust in from outside to the optics and to the camera. The extra sealing and gasketing that N and C pro lenses now get helps prevent this. Apparently removing the aperture ring and requiring camera control of aperture also helps. DJE
