Posted 11 August 2009 - 08:09 PM
I was just curious. I never (prob have had differences in exposure ranging from 1/3 of stop) underexpose/overexpose anything by that little and if I have haven't noticed anything.
Posted 11 August 2009 - 08:50 PM
Posted 11 August 2009 - 08:59 PM
Before he died, my dad could tell around 1/3rd of a stop, but glaucoma got the best of him first, and eventually it was just mostly blobs, according to him; so maybe 'round a stop then (let's just say he used his meter a lot more as he aged)
Posted 11 August 2009 - 11:38 PM
Unless you are talking about exposing for absolutely proper rendering of an 18% gray card / gray scale to be viewed in lab-like conditions, I think this really falls in the subjective realm.
But if someone showed you a series of bracketed exposures of the same picture one next to the other, I think a 1/3 stop exposure difference would be somewhat easily identified _perhaps not by laymen, but certainly by professionals and trained eyes.
Posted 12 August 2009 - 01:04 AM
Depends on the eye in question. Owen Roizman claimed in "Cinematographer Style" that he can see a difference of 1/10 of a stop! A friend of mine who worked with Hiro Narita a few years ago said he could look at a bunch of HMIs lighting a white wall and discern exactly how much green/magenta correction each light needed without a color meter. Douglas Slocombe was famous for never using a light meter.
When can your eye discern the difference in exposure?
Posted 12 August 2009 - 01:42 AM
Douglas Slocombe was famous for never using a light meter.
But I bet he asked his gaffer for a key level of X footcandles.