 Steven Chaitoff |
t-stops Can anyone give an explanation of a t-stop? -Steven
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Jon Close |
T-stop is an alternative system of determining exposure and controlling lens aperture, based on light Transmission. See http://photonotes.org/cgi-bin/entry.pl?id=Tstop.
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John A. Lind |
Yep . . . and some additional info: T-stops are the effective aperture after everything that reduces or absorbs light is taken into account. I haven't seen a lens designed for still photography with T-stops marked on it, but that doesn't mean someone somewhere hasn't created one (would be exceedingly rare). T-Stops are more exact for exposure and are used on cinematography lenses . . . each specific lens being calibrated and marked individually with its own T-stops. Exact exposure from scene to scene and from each camera shooting the same scene (from different angles) is required to allow editing the film together without obvious changes in exposure that might occur using f-stops. -- John Lind
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