Originally posted by Anvh Ever read the instruction Kodak put with those grey cards?
It says you need to open up with 1/2 stop when using the greycard for exposure
Anyway the ANSI PH3.49-1971 "American National Standard for General-Purpose Photographic Exposure Meters (Photoelectric Type)" stated 30 +/- 5 footcandles which work out about 12.3% reflective.
Either your meters aren't confirm with the standard or you have read it wrong.
http://david.spielman.com/Gray_Card/ANSI_PH3_49_1971.PDF I cant say Ive ever used or felt the need to use a grey card Ta lol
I used the gossen lunasix F for bronica ETRS and Bronica RF 645
and a sekonic 535 for the Mamiya RZ67. Both meters proved to be extrordinarly reliable in the exposure department even with slide film.
Which Im sure would have shown a half stop under exposure lol
Understanding Camera Metering and Exposure ( QUOTE )
Judging tones is a matter of practice and experience anyway with a splash of comon sense thrown in.
everything you tend to read in books or magazines say 18%
I googled How do camera light meters work ! The link above is simply the first thing that came up. No surprise to me its quoting 18% wether right
or wrong. If they too are wrong, then so is almost everything else you read about it. Maybe you are right and everyone is wrong.
My personal thoughts on the matter are more... so what, who cares ? Im sure everyone gets the jist lol. and if the Kodak grey card comes
with instructions saying open up by half a stop and it works... sorted ! If I had bought one and read this I would think what a waist of time buying it.
I would also just assume that it was down to the reflectivity of the card losing light etc. Ive not even read the above link. Maybe there is a mention
of 12% for all i know. What i did notice was the row of coloured squares with 18% wrote on every one of them though.
Im sure there is a reason for this conflicting bit of info. Im not really intrested enough to delve into it if there is though lol