[pure-silver] Re: Fog
- From: "Leigh Solland (on Webmail)" <solland@xxxxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Wed, 28 Sep 2005 11:42:36 -0600
Quoting Shannon Stoney <sstoney@xxxxxxx>:
> >----- Original Message ----- From: "Shannon Stoney" <sstoney@xxxxxxx>
> >To: <pure-silver@xxxxxxxxxxxxx>
> >Sent: Tuesday, September 27, 2005 6:12 PM
> >Subject: [pure-silver] Fog
> >
> >>I have been shooting with a renovated Rollei TLR from the thirties.
> >>Some of the exposures look fogged, but the fog does not appear to
> >>be coming from a leak in the camera. It is only in the area where
> >>the lens can expose the film. I wonder what is causing this? It
> >>is not consistent on a given roll of film; it is only on a few
> >>exposures usually. I wonder if it might have to do with the fact
> >>that the lens is probably uncoated?
> >>
> >>--shannon
> >>
> >
> > I don't think its the lens but check it by shining a flashlight
> >through it while the shutter is on B (or T if its an olde enough
> >camera). The lens should be crystal clear. If it shows any haze
> >inside the haze will reduce contast a surprizing amount. However, it
> >will affect all frames. Usually this haze is easy to clean off but,
> >if its in the front cell, requires some disassembly.
> > Usually light leaks show up as streaks or bars in a part of the
> >image. If you are getting this check the back to see if its warped.
> >Also check along the inner edge of the upper part of the back, it
> >has a black yarn light seal. Both the "old standard" and later
> >Rolleis have this seal.
> > Also check for shiny areas in the camera box that could be
> >reflecting light from the lens
>
>
> There is a very shiny area in fact, screwed to the back. I think
> that might be the culprit. It is exactly the size of a frame of film
> and it is exactly opposite the lens. What were they thinking? Could
> this be a replacement part that was not painted black? I will paint
> it as you describe below.
Shannon, I think that is a bad idea. The "shiny area" is plated so that it
will be slippery for the film to slide across. Painting it will make it less
slippery and tighter, which may lead to scratching.
It is presumably all on the back side of the film, so the anti-halation
coating on the film will keep the light from bouncing around.
Is it possible that you either (a) shot into the sun on some shots, without a
lens hood or other means of blocking the light, and got lens flare? (this
would indeed be worse with an uncoated lens), or (b) have a shutter that is
intermittently sluggish, that allows too much light in on some frames?
Good luck,
Leigh
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