Go Back   Rangefinderforum.com > Cameras / Gear / Photography > Gearhead Delights > Photo Accessories / Bags/ Meters / Tripods etc

Photo Accessories / Bags/ Meters / Tripods etc A place to discuss the delights of photo accessories, including bags, meters, tripods, filters, straps, camera cases, lens hoods, anything non digital that can make your gearhead life a little bit more enjoyable.

Reply
 
Thread Tools Search this Thread Display Modes

Selenium Cells
Old 06-23-2019   #1
Dralowid
Michael
 
Dralowid's Avatar
 
Dralowid is offline
Join Date: Jul 2006
Location: United Kingdom
Posts: 2,611
Selenium Cells

What makes a selenium cell in an old light meter or camera deteriorate?

Continuous exposure to light? (as in on a shelf display)

Age?

Something else?
  Reply With Quote

Old 06-23-2019   #2
Sarcophilus Harrisii
Brett Rogers
 
Sarcophilus Harrisii is offline
Join Date: Jun 2009
Posts: 2,648
Age, moisture, perhaps light exposure may facilitate deterioration of the secondary and tertiary layers of the cell, but it is a myth that light wears out the selenium itself—rather that the generation of power slightly hastens the natural process of aging. I had written much more, but my phone having discarded that post it may have to wait until I'm in a better mood to reiterate it...
  Reply With Quote

Old 06-23-2019   #3
Mr_Flibble
Registered User
 
Mr_Flibble's Avatar
 
Mr_Flibble is offline
Join Date: Jul 2007
Location: The Lowlands
Age: 42
Posts: 4,095
Estimated Selenium cell life is definitely shorter than that of Solar cells.

But as Brett says it's not so much the light that kills the cell. It's exposure to temperature swings and UV lighting that'll destroy the protective coating of the cell and eventually cause it to die.
__________________
Rick - In Tabulas Argenteas Refero
Loaded with film: Leica IIIc and a Graphic 23 roll film holder
Latest Toys: Agfa Billy Record, K.W. Etui, unknown 9x12 folder.
  Reply With Quote

Old 06-23-2019   #4
CameraQuest
Head Bartender
 
CameraQuest is offline
Join Date: Mar 2005
Location: over the hills from Malibu
Posts: 5,707
Most of the time Quality Light Metric in Hollywood California can repair or replace your selenium meter cells

https://www.facebook.com/pages/Quali...54305868044042
  Reply With Quote

Old 06-23-2019   #5
johnrt
Registered User
 
johnrt is offline
Join Date: Feb 2018
Posts: 21
Quote:
Originally Posted by CameraQuest View Post
Most of the time Quality Light Metric in Hollywood California can repair or replace your selenium meter cells

https://www.facebook.com/pages/Quali...54305868044042
I wonder if they could bring an old Leicameter MC back to life?
  Reply With Quote

Old 06-23-2019   #6
Robert Lai
Registered User
 
Robert Lai is offline
Join Date: May 2007
Posts: 1,637
QLM has run out of replacement selenium cells.
They had a few for years, but they have been used up in repairs.
I had them repair my Weston III and Weston V meters with new cells. But, those days are over.
  Reply With Quote

Old 06-23-2019   #7
markjwyatt
Registered User
 
markjwyatt's Avatar
 
markjwyatt is offline
Join Date: Nov 2018
Location: Southern California
Posts: 617
In have three selenium cell photo meters that seem to work- the built-in one on my Retina IV Reflex, A Sekonics L-VI, and a GE PR1. My Gossen Luna Pro SBC and Minolta Spotmeter M died, and Quality says are not repairable (Economics for the SBC and parts for the Minolta). My regular Gossen Luna Pro still works with Wein cells. I was really looking forward to having a 1 degree spotmeter again... Oh, well, for now I don't.
__________________
Flickr: https://www.flickr.com/photos/markjwyatt/
  Reply With Quote

Old 06-25-2019   #8
Dralowid
Michael
 
Dralowid's Avatar
 
Dralowid is offline
Join Date: Jul 2006
Location: United Kingdom
Posts: 2,611
I ask the question because some seem to survive and others don't. I collect old 8mm movie cameras and many 'automatic' ones have built in big meters by well known manufacturers that drive the aperture while filming. There seems to be no logic to survival which ties in with what is said above.

CDS meters tend to offer up a worse problem. A well hidden battery compartment unopened for 40 odd years and stored possibly at the back of a damp garage makes for something quite nasty!
  Reply With Quote

Old 06-25-2019   #9
Beemermark
Registered User
 
Beemermark's Avatar
 
Beemermark is offline
Join Date: Jan 2007
Location: Wilmington, NC
Posts: 1,697
So you used to be able to buy selenium cells for repairing meters. Can't find them on the internet anymore. Really miss Radio shack.
  Reply With Quote

Old 06-25-2019   #10
johnrt
Registered User
 
johnrt is offline
Join Date: Feb 2018
Posts: 21
This chap seems to have a supply from somewhere, he’s repairing and restoring Old Weston Meters
https://ian-partridge.com/cells.html
  Reply With Quote

Old 06-25-2019   #11
Ronald M
Registered User
 
Ronald M is offline
Join Date: Aug 2005
Posts: 4,512
Quote:
Originally Posted by CameraQuest View Post
Most of the time Quality Light Metric in Hollywood California can repair or replace your selenium meter cells

https://www.facebook.com/pages/Quali...54305868044042
I send all my meters there. Never a problem.
  Reply With Quote

Old 06-25-2019   #12
richardHaw
junk scavenger
 
richardHaw's Avatar
 
richardHaw is offline
Join Date: Mar 2017
Location: Tokyo
Posts: 417
theres a way to "revive" an old panel

it works....sometimes

1: clean everything really well but be careful not to damage the panel.
2: heat the soldered points.
3: check if voltage changed for the better.
4: replace all wiring if it did.

if that didnt work:
bake it under the hot sun for a couple of hours.

if those didnt work:
its dead, jim

i have revived a few using the above method. no harm in trying yourself. there are times when the panel itself is still good but the connection isnt. rotten wiring, undone soldering
__________________
Take me down to the Parallax City
Where the viewfinder's tiny
And the framing is tricky
http://www.richardhaw.com
  Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 04:28.


vBulletin skin developed by: eXtremepixels
Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.

All content on this site is Copyright Protected and owned by its respective owner. You may link to content on this site but you may not reproduce any of it in whole or part without written consent from its owner.