That looks like the sort of explanation Calvin's dad would provide :-) On Mon, Apr 23, 2007 at 10:01:05PM +0100, Bob W wrote: > It's photon residue, popularly known as 'light lint'. It's scientific > Latin name is 'Floccus lucis'. > > The stuff that the filter stops from going into the lens has to go > somewhere, and so it gets trapped between the filter and the front > element. It's the light equivalent of all that fluff that accumulates > in the filter of your clothes dryer and which is so satisfying to > remove. > > -- > Bob > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > > Behalf Of Shel Belinkoff > > Sent: 23 April 2007 21:00 > > To: Pentax-Discuss Mail List > > Subject: Re: Protection glass / filters, especially consumer glass > > > > 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 > > PDML@pdml.net > > http://pdml.net/mailman/listinfo/pdml_pdml.net > > > > > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net
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