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Jesito
Joined: 24 Aug 2007
Posts: 5745
Location: Olivella, Catalonia, (Spain)
Expire: 2015-01-07
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 Posted: Mon May 18, 2009 9:06 am Post subject: Notes on repairing: Weston Master III light meter |
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Jesito wrote:
I got this light meter from eBay for only 0,99GBP plus shipping.
Click here to see on Ebay
The ad is clearly misleading, the glass lid was loose on arrival and the meter didn't work at all with the needle stuck. Anyway the seller sent me a note prior shipping it telling "This exposure meter is very old and is more like a collectable thing. Although its working I realy dont think you can use its readings as a relayable source for your camera settings. This si just to make sure youre not disappointed"
so I didn't expect too much from it anyway, and the price was fine.
I spent some time looking for information to break it apart, but I found only the User's manual and some notes on how to disassemble the Weston Master II, that should be similar. Even being different, those notes opened the way to repair it.
The meter is made all on metal, strong building.
The opening zone is on the bottom side, under a small plate fixed by two supposed rivets. They are just screws with no groove? on the screw head. (I don't know the english word for this).
To remove them, small pliers and a lot of care:
Do not touch the center screw, it's only for adjustment and has nothing to do with the disassembly process.
Under the metal lid there are two more screws, sealed under wax. It's necessary to remove it to get to the screw head.
Once these screws out, the back cover goes out under pressure, from the bottom up (some retainers in the top side). Below they appear the remaining screws. Be careful with the two springs that handle the scale change.
The last screw on top, again under wax seal:
Once the screws removed everything is handy. The meter cover goes out easily. Be careful with the meter needle.
At this point I was too concentrated in fixing it that I forgot to take more pictures, but essentially was a general cleanup, specially on the glass area, cementing again the glass on it's base, disassembling the selenium cell and cleaning the contact area with a dry Scotch Brite (quite abrasive). From then on, the needle was responsive to the light changes, so I finally could build it all again in reverse order.
Now I have to rebuild the leather case. But that is a different story.
Regards,
Jes.
_________________
Jesito, Moderator 
Jesito's backsack:
Zooms Sigma 70-300, Tamron 35-135 and 70-210 short, 70-210 long, 28-70 CF Macro, 35-70, 35-80, Vivitar 70-210 KA, Tamron 70-250.
Fixed Industar-50, , Tamron 24mm, Tamron 135mm, Sands Hunter 135mm, Pancolar 50mm, Volna-3, many Exakta lenses
DSLR SIGMA SD9 & SD14, EOS 5D, Sony A700 and NEXF3, Oly E-330, E-400, E-450, E-1
TLR/6x6/645 YashicaMat, Petri 6x45, Nettar, Franka Solida, Brilliant
SLR Minolta X300, Fuji STX II, Praktica VLC3, Pentax P30t, EXA500, EXA 1A, Spotmatic(2), Chinon CM-4S, Ricoh, Contax, Konica TC-X , Minolta 5000, 7000i, 3Sxi, EOS 500 and CX
Rangefinders Chinon 35EE, Konica C35 auto, Canonet 28, Yashica Lynx, FED-2, Yashica electro 35, Argus C3 & C4, Regula Cita III, Voigtlander Vitoret (many), Welta Welti-I, Kodak Signette 35, Zorki-4, Bessa-R & L, Minolta Weathermatic, olympus XA2
Compact Film Konica C35V, Voigtlander Vitorets, Canon Prima Super 105, Olympus XA2 and XA3
Compact Digital Olympus C-5050, Aiptek Slim 3000, Canon Powershot A540, Nikon 5200, SIGMA DP1s, Polaroid X530, IXUS55, Kodak 6490, Powershot G9 and G10
CSCCanon EOS-M, Samsung NX100 and NX210, Lumix G5, NEX-F3 |
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GrahamNR17
Joined: 17 Jan 2009
Posts: 1855
Location: Norfolk, UK
Expire: 2012-09-06
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| Posted: Mon May 18, 2009 11:39 am Post subject: |
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GrahamNR17 wrote:
Jes, superb information, thankyou so much 
I have this exact meter which works perfectly, but the day will come when it does not. Having these instructions will help when the time comes 
Congrats on your superb budget meter. I love it when people can resurrect old gear that would have been stuck in the trash |
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Jesito
Joined: 24 Aug 2007
Posts: 5745
Location: Olivella, Catalonia, (Spain)
Expire: 2015-01-07
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| Posted: Mon May 18, 2009 12:42 pm Post subject: |
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Jesito wrote:
| GrahamNR17 wrote: |
Jes, superb information, thankyou so much
I have this exact meter which works perfectly, but the day will come when it does not. Having these instructions will help when the time comes
Congrats on your superb budget meter. I love it when people can resurrect old gear that would have been stuck in the trash |
Thanks, Graham!
If the day arrives, feel free to ask about the internals I didn't put into pictures. Disassembling the Selenium cell is easy but tricky. Reassembling the scale-shift mechanism as well. It's quite obvious but it took me a while to figure out how the springs are located and some other small details.
Regards,
Jes.
_________________
Jesito, Moderator
Jesito's backsack:
Zooms Sigma 70-300, Tamron 35-135 and 70-210 short, 70-210 long, 28-70 CF Macro, 35-70, 35-80, Vivitar 70-210 KA, Tamron 70-250.
Fixed Industar-50, , Tamron 24mm, Tamron 135mm, Sands Hunter 135mm, Pancolar 50mm, Volna-3, many Exakta lenses
DSLR SIGMA SD9 & SD14, EOS 5D, Sony A700 and NEXF3, Oly E-330, E-400, E-450, E-1
TLR/6x6/645 YashicaMat, Petri 6x45, Nettar, Franka Solida, Brilliant
SLR Minolta X300, Fuji STX II, Praktica VLC3, Pentax P30t, EXA500, EXA 1A, Spotmatic(2), Chinon CM-4S, Ricoh, Contax, Konica TC-X , Minolta 5000, 7000i, 3Sxi, EOS 500 and CX
Rangefinders Chinon 35EE, Konica C35 auto, Canonet 28, Yashica Lynx, FED-2, Yashica electro 35, Argus C3 & C4, Regula Cita III, Voigtlander Vitoret (many), Welta Welti-I, Kodak Signette 35, Zorki-4, Bessa-R & L, Minolta Weathermatic, olympus XA2
Compact Film Konica C35V, Voigtlander Vitorets, Canon Prima Super 105, Olympus XA2 and XA3
Compact Digital Olympus C-5050, Aiptek Slim 3000, Canon Powershot A540, Nikon 5200, SIGMA DP1s, Polaroid X530, IXUS55, Kodak 6490, Powershot G9 and G10
CSCCanon EOS-M, Samsung NX100 and NX210, Lumix G5, NEX-F3 |
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Attila
Joined: 24 Feb 2007
Posts: 57852
Location: Hungary
Expire: 2025-11-18
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| Posted: Mon May 18, 2009 12:49 pm Post subject: |
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Attila wrote:
Many thanks Jes!!
_________________
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Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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Jesito
Joined: 24 Aug 2007
Posts: 5745
Location: Olivella, Catalonia, (Spain)
Expire: 2015-01-07
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| Posted: Mon May 18, 2009 12:55 pm Post subject: |
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Jesito wrote:
| Attila wrote: |
| Many thanks Jes!! |
You're welcome, Attila!
Jes.
_________________
Jesito, Moderator
Jesito's backsack:
Zooms Sigma 70-300, Tamron 35-135 and 70-210 short, 70-210 long, 28-70 CF Macro, 35-70, 35-80, Vivitar 70-210 KA, Tamron 70-250.
Fixed Industar-50, , Tamron 24mm, Tamron 135mm, Sands Hunter 135mm, Pancolar 50mm, Volna-3, many Exakta lenses
DSLR SIGMA SD9 & SD14, EOS 5D, Sony A700 and NEXF3, Oly E-330, E-400, E-450, E-1
TLR/6x6/645 YashicaMat, Petri 6x45, Nettar, Franka Solida, Brilliant
SLR Minolta X300, Fuji STX II, Praktica VLC3, Pentax P30t, EXA500, EXA 1A, Spotmatic(2), Chinon CM-4S, Ricoh, Contax, Konica TC-X , Minolta 5000, 7000i, 3Sxi, EOS 500 and CX
Rangefinders Chinon 35EE, Konica C35 auto, Canonet 28, Yashica Lynx, FED-2, Yashica electro 35, Argus C3 & C4, Regula Cita III, Voigtlander Vitoret (many), Welta Welti-I, Kodak Signette 35, Zorki-4, Bessa-R & L, Minolta Weathermatic, olympus XA2
Compact Film Konica C35V, Voigtlander Vitorets, Canon Prima Super 105, Olympus XA2 and XA3
Compact Digital Olympus C-5050, Aiptek Slim 3000, Canon Powershot A540, Nikon 5200, SIGMA DP1s, Polaroid X530, IXUS55, Kodak 6490, Powershot G9 and G10
CSCCanon EOS-M, Samsung NX100 and NX210, Lumix G5, NEX-F3 |
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