On Mar 20, 2005, at 7:58 PM, David Goldwasser wrote:
I have used exposure bracketing on Canon 300d and 20d hundreds of time
without any problems, however had problem a few days ago when shooting
in cold windy environment with snow. I was shooting an 8 shot single
row pano with camera in manual and shots spaced at 1 and 2/3rd stops.
So most came as expected, however on one of the sets I got three shots
all at same shutter speed (1/250 - the middle of the three speeds).
Oddly, the Exposure Compensation shows the +/- 1.7 for the first and
third shot but the shutter speed did not change. Yet right after this
the next set shot just a second later was back and working fine. This
was not a critical shot but is disconcerting. Maybe while still on
site need to take the time to run through shots to confirm histogram
or EXIF data to see that it worked correctly. Up to this point I could
just assume they worked. Of course on longer exposure settings I could
probably tell by the rhythm of the shutter sound if there were three
of the same vs. progressively longer exposures.
Has this happened to anyone else? I'm hoping a snowflake getting in
the wrong place caused a temporary glitch and that it won't happen in
normal shooting conditions. (I was snowshoeing in Rocky Mountain NP,
temp about 10-15 winds about 30mph - Buuuur!)
Very weird! I've shot almost 10,000 frames with my 20D, probably 1/3 of
those for panos (and most of those bracketed), and have never seen this
happen!
Granted, I live in SoCal, but it's not been all sunny this year :)
If it happens again under similar circumstances please let us know!
Very interesting.
-R
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