How to verify an exposimeter?

[AlchimistaDigitale]

Hi,

I have a series of old camera.

But how I can if the exposimeter is fully functional? There is some tech guide for check the functional status?

Thanks very much

 

[Roger Hicks]

It's probably impossible to check them in absolute terms. Checking them in relative terms (against another meter of known acceptable accuracy) is however quite easy. You need a constant diffused light source (a "light box") and you can vary the intensity by stacking sheets of white paper on top of it.

Cheers,

R.

 

[sanmich]

you check against a know good light meter on an even surface

 

[newspaperguy]

"SUNNY SIXTEEN"?

Always a useful check.

 

[Roger Hicks]

"SUNNY SIXTEEN"?

Always a useful check.

Dear Rick,

Yes, but unfortunately not very accurate. Helps avoid gross errors: doesn't really tie in to sensitometry.

Cheers,

R.

 

[shortstop]

I've changed the rule of 16 in rule of 11. And, as you see in the photo, I'm not the only one.

 

[Ko.Fe.]

I "calibrated" my iPhone free light meter application against of my DSLR.
Took picture with DSLR, checked exposure parameters for picture taken in AV mode with fixed ISO. Did the same with the phone application.
Adjusted exposure compensation in phone app to match the DSLR image.
I used light situation which is most difficult to guess. Mix of low light areas and bright areas. A.k.a the corridor at the first floor in my house which goes to front door and window.
In OP situation I recommend to check exposure with any digital camera to be able to see exposure parameters and verify picture. And set light meter according to it.

 

[Roger Hicks]

I "calibrated" my iPhone free light meter application against of my DSLR.
Took picture with DSLR, checked exposure parameters for picture taken in AV mode with fixed ISO. Did the same with the phone application.
Adjusted exposure compensation in phone app to match the DSLR image.
I used light situation which is most difficult to guess. Mix of low light areas and bright areas. A.k.a the corridor at the first floor in my house which goes to front door and window.
In OP situation I recommend to check exposure with any digital camera to be able to see exposure parameters and verify picture. And set light meter according to it.

But exposure for digital is designed not to blow the highlights. Exposure for film is designed to expose the shadows adequately. If the subject has a long brightness range, the optimum exposure is NOT the same for both. To say nothing of the tolerance of film for overexposure.

Cheers,

R.