===Suppose this is true, then the gap between a two minute exposure and a 4
minute exposure would be really big. This leads me to think that a finer
granularity is actually used for the long exposures. However, in case the 2
power range is indeed used, it should be easily verifiable by taking an auto
exposure in a completely dark room, and checking if the camera cuts it off
after exactly 4 minutes (i.e. 240 seconds) or after 256 seconds. Has anyone
ever done this?====
A non techie response,
The idea of auto exposure is that there is no limiting factor between
shutter speeds.
>From 1/1000 to 4 minutes or whatever is needed or possible in between to
give correct exposure.
Enough light and the shutter closes, no?
So as I get it, the exposure could be 240.3 sec. or 240.4 sec or anytime
needed.
I believe that linear is the term. Same as 1/250 or 1/125 or anything in
between.
Isn't this the real reason for auto exposure anyway, more accurate than
setting
full stops on manual. Especially good for transparency film.
Am I getting this right, or do you mean something way over my head?
Charlie L.
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