I used the self same meter, incident, and reflected of an 18%
gray card. The readings were exactly the same. If the meter was
calibrated at 13% or so, the readings off the gray card would
have been 1/2 stop higher. They weren't.
BTW, when I did the test off the brick wall (mentioned in post
about Vivitar 24mm f2.0) the other day. the wall was about the
same with the ME Super autoexposure as it was with the incident
meter. I did not do a reflected reading of the wall with the
Sekonic.
--Tom
Mark Roberts wrote:
>
> Tom Rittenhouse <[EMAIL PROTECTED]> wrote:
>
> >Humm... I emailed Sekonic with a request for clarification on
> >this some time back. I never received a response. Where did you
> >get the information that Sekonic meters are calibrated to 12.5%?
> >
> >I just now stepped out the door and took an incident reading
> >with my Sekonic L-308, then I took a refected reading off an 18%
> >gray card with the same meter. The readings were exactly the
> >same. The meter reads to 1/10 stop so if they were different it
> >would have showed. Now, this tells me the meter is calibrated to
> >18%. Where did you get different information?
>
> If the *camera* is calibrated to 18% then the camera will meter correctly off an
> 18% grey card; in other words, it'll read the same as the incident meter.
> Actually, if you *calibrated* the in-camera metter to a 31.929% grey card (for
> example) and took a reading of a 31.929% grey card, you'd get the *same*
> exposure yet another different way.
>
> The web page listed in my original post (I have the information at work, I
> think) quoted a representetive from Sekonic and Mamiya (same company? same
> importer?) as saying Sekonic light meters are calibrated at 12.5% and Mamiya
> cameras are calibrated at 14% (and, no, he didn't explain why the difference).
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--
Tom "Graywolf" Rittenhouse
Graywolf Photo, Charlotte, NC, USA
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