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Old 16th July 2013, 11:17 PM
alexmuir alexmuir is offline
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Default Exposure meter calibration.

I am sure that I read somewhere that Japanese meters use a different calibration from European (Gossen) meters. Does anyone know if that is correct, and if so, what is the difference? Alex.
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Old 17th July 2013, 07:26 AM
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Miha Miha is offline
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Are you talking about the 'K factor'? A good read on the subject: http://dpanswers.com/content/tech_kfactor.php
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Old 17th July 2013, 11:45 AM
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Miha - Thank you for that: it looks interesting and I've bookmarked it for reading later.
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Old 17th July 2013, 01:08 PM
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If you do 'real world' tests to establish your own personal EI (i.e tests using film exposed in your camera, processed by you and printed by you) the calibration of your meter is irrelevant.

The most important things about a meter are consistency and that it meters colours in a way that reflects how your film reacts to them.

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David
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Old 17th July 2013, 05:08 PM
Mike O'Pray Mike O'Pray is offline
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Certainly an interesting read Miha. Thanks for the link.

Mike
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Old 17th July 2013, 09:03 PM
alexmuir alexmuir is offline
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Thanks for the info Miha. That seems to be what I had read, probably the references to "The Negative". Alex.
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Old 17th July 2013, 09:20 PM
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Michael and Mike you are welcome.

David indeed I agree with you, but what if you have no control over developing and printing? Or you only shoot reversals.

Alex, yes the 'K-factor' is what I read in The Negative as well.

Last edited by Miha; 17th July 2013 at 09:32 PM.
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Old 18th July 2013, 08:23 PM
Paulographic Paulographic is offline
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My Minolta Autometer often gives a different reading from my Westons. The Minolta suggesting I down rate the film speed.
I've two of the Minoltas and they are consistently the same difference, but only under certain lighting conditions, at other times they agree.
The negs are always OK. ?
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Old 18th July 2013, 10:23 PM
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Paul, with older Westons there's a third of a stop difference from ASA: 100 ASA=80 Weston etc. I'm sure someone here can give chapter and verse on when the difference was ironed out.

Last edited by Michael; 18th July 2013 at 10:24 PM. Reason: correcting a misspelling
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Old 19th July 2013, 06:51 AM
Paulographic Paulographic is offline
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Quote:
Originally Posted by Michael View Post
Paul, with older Westons there's a third of a stop difference from ASA: 100 ASA=80 Weston etc. I'm sure someone here can give chapter and verse on when the difference was ironed out.
My Westons are a V which I bought and IV which my father-in-law gave me in the '70s.
If I take a reading with my Nikon FA set to multi pattern metering it invariably gives me the same result as a Weston incident reading. As a student incident reading was recommended for beginners to get good results and it's still my main method, certainly for flash.
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