[pure-silver] Re: Fog
- From: "Richard Knoppow" <dickburk@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Tue, 27 Sep 2005 20:22:23 -0700
----- 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. If the anti-reflection
paint is missing somewhere replace it with Krylon
Ultra-Flat-Black, a very good light absorber. This material
is available only in spray cans so you must spray some into
a small container and use a brush to paint the camera. One
way to look for leaks is to tape a bit of white writing
paper to the film back plate, close the camera, and, while
looking into the camera through the lens, shine a strong
flashlight around the back. It is extremely unlikely that
there is a leak on the front but it can be checked simply by
opening the back and shining a strong light around the
front.
Check the Ferdi Sutterheim's Rollei site at
http://www.rollei-gallery.net/
You can identify the model from
http://www.mir.com.my/rb/photography/companies/rollei/rolleiflex/reflexmodel.htm
Also, consider joining one of the Rolleiflex mailing
lists. I am co-administrator of one at:
//www.freelists.org/list/rollei_list
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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