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[Roland+Schregle]

 Hi folks,
 
I'm new here (and to camera repair), so please bear with me. This is a rather long one for the SL35 gurus out there. (Are there any? Does anyone else actually still *use* this camera?)
 
I've got two Rolleiflex SL35's here

[Robert]

 Yes, this is a quirk you've missed! If you were to habitually photograph illuminated screens, then you should deviate from the service manuals instructions.
As for that pot, it's probably needs cleaning, or more likely, based on your des

[Robert]

 After digging out the meter schematic and studying the manual a bit, I think your problem is just (very) old CdS cells. They frequently age from a linear response to a non-linear response, the line on the graph goes from a straight(ish) line to a U-s

[Roland Schregle]

 Thanks a lot for that resonse, Rob!
 
Yeah, I figured the cells' aging might have something to do with it (altough I assumed the response would simply level off like a logarithmic curve instead of sagging in the middle like a U-shape).
 

[Winfried]

 CdS photo resistors typically have very high resistance (more than 1 MOhm) in darkness - that's why many cameras do not have a meter switch, they are virtually switched off as soon as you block the light with a lens cap.  
 
Usually the resistanc

[Roland Schregle]

 Hi Rob,
 
thanks for the info. So I need to specifically look for CsS photoresistors, right? Do your schematics list any specific type?
 
I see a bunch of photoresistors in Reichelt's catalog, though CdS isn't mentioned anywhere. The

[Roland Schregle]

 Howdy folks,
 
an update on the CdS thingies: I've managed to remove them after lifting off the finder prism and unsoldering them.
 
The photoresistors come in a gold-coloured metal casing and bear the label CL1323, which I assume to be t

[Roland Schregle]

 Well, I've been looking round for replacements and I'm having a *very* hard time.
 
Reichelt's catalog simply lists three LDR types without any specs whatsoever, and the guy on the phone couldn't tell me more.
 
RS Components lists

[K.Sivasankaram]

 Hi Folks,
I have had similar experience with my Rollei SL-35. When new the exposure meter was reading correctly but as time went on setting the aperture by the exposure meter indication resulted in under exposure. I now open the aperture a couple of

[Roland+Schregle]

Well, thought I'd get back to this thread after several months for the benefit of those searching the archives.
 
I experimented with several replacement photocells from Perkin Elmer (some of which were bloody difficult to get), and the upshot