shooting with tungsten light sourcegreenspun.com : LUSENET : Large format photography : One Thread
I've heard that shooting with tungsten light source makes a film (B+W) underexposed about 1/2 stop if I expose the film accoding to meter reading. Is it true? thanks susumu
-- tanaka susumu (firstname.lastname@example.org), July 22, 2000
It depends on the spectral sensitivity of the film (and meter). Many of the films that are "panchromatic" are a little deficient in response on the red end of the spectrum, add to this the possible metering errors in reading the light, and you can be off by 1/2 stop or more.
-- Wayne DeWitt (email@example.com), July 22, 2000.
I'll second Wayne's reply. Kodak used to give recommended daylight speeds and Tungsten speeds for their films. FI Tri-x is rated as 400 ISO in daylight and 320 ISO for Tungsten.
-- Pete Andrews (firstname.lastname@example.org), July 24, 2000.