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Len Histand

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Posted on Tuesday, November 23, 2004 - 08:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)
Hi,
Have a K1000 that I bought used about 5 years or so ago. The first thing I did was to check the light meter against all of my other cameras and lightmeters that I know to be correct. I came to the concluusion that the meter read about 1/2 stop low. (ie. it would overexpose by 1/2 stop.).
All was well with the appropriate compensation. Now I check it again and I find it reads two stops low. This camera was not used very much during that time and was stored in a light tight box. The battery is not the problem as I switched new batteries with another accurate K1000 with the same result - a two stop difference.
The question is - what would cause the meter to change? Does the CdS cell age over time? Are there other components in this very basic circuit which can degrade? I have tried turning the ASA knob while watching the needle and all is smooth. I use this camera for BW only and can use a handheld meter, but I am just curious as to what could cause this. Thanks, Len
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paul ron

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Posted on Wednesday, November 24, 2004 - 02:31 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)
Are you using any filters on the lens?

Ever think maybe the meter you are comparing is off? I have an 8' floescent light in my basement work shop so I meter off that as my reference. It may not be the best science has to offer or not quite up to the national standards but I find my meters are faily close over the years.

Perhaps your K1000 has an oxidizing solder joint in the circuit. Maybe your batery compartment has oxidation on the battery contacts. 5 years is a bit premature to have a photo cell go bad.

Take the bottom plate off and take a look at the batery compartment and wires.

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