[rollei_list] Re: Light meter fix
- From: "Eric Goldstein" <egoldste@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Thu, 12 Apr 2007 15:06:17 -0400
Todd Belcher would likely know if replacement cells are available.
Eric Goldstein
--
On 4/12/07, Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:
----- Original Message -----
From: "Robert Lilley" <54moggie@xxxxxxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx>
Sent: Thursday, April 12, 2007 9:02 AM
Subject: [rollei_list] Re: Light meter fix
>I think Slobodan means that Quality Light Metric will not
>work on light
> meters in cameras - only external light meters. Does
> anyone know where I
> might find someone who does renew these light meters in
> the camera?
>
> Rob
I don't know but I would try the regulars like Harry
Fleenor or Krimar. AFAIK, the problem has been obtaining new
cells. It is typical for Selenium cells to become non-linear
due probably to moisture getting into them. This makes the
meter read low for high light intensities but normal for low
intensities. AFAIK, there is no way to salvage the cell: it
must be replaced. Usually the meter movement is OK.
If the meter does not read at all its could be the
meter movement or wiring. Typical Selenium cell meters are
very simple, just the meter and cell and the wiring. Because
the output of a Selenium cell is dependant only on its area
and the light intensity no calibration means (variable
resistors, etc.) are necessary. I am not sure how the
contact between the cell and the wiring is made in the
Rollei meter but in some stand alone meters, like the Weston
and General Electric, the cell is held by spring loaded
contacts. These can get corroded causing the meter to be
inoperative or dead. Weston meters can often be brought back
to life by simple pushing in on the lens and rotating it a
little.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
---
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