In my case it was more than dust, but something more akin to a haze or a film. Yeah, there was a little dust in there as well.
Apart from the dust, my theory about the haze is that there may be something in the lens, like lubricants, that emit some gas or evaporate slightly (we've all experienced the lubricant getting dry at one time or another), and that the filter over the lens element prevents the evaporation from just dissipating into the atmosphere. Dust, like rust, never sleeps! Shel > [Original Message] > From: William Robb > ----- Original Message ----- > From: "Godfrey DiGiorgi" > > Subject: Re: Protection glass / filters, especially consumer glass > > > > > > On Apr 23, 2007, at 11:42 AM, Jack Davis wrote: > > > >> BTW, in my world dust cannot > > > migrate to the area between the filter > >> and the lens unless the filter is removed. :) > > > > lol ... Do you have them sealed somehow? ;-) > > > > I always thought that too, which is why I found the consistent build > > up of dusty film between the two quite curious. > > > > I could never figure that out either. I had a filter on my Nikkor 50/1.4 > from the time I bought it. I was pretty good about cleaning the front > surface, but ignored the inside surfaces. It was quite amazing how much dust > was in there after a year or so. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
