Ayash Kanto wrote:
> The room was made absolutely dark, so I don't think the light meter got
> affected while taking the first shot. Rob's explaination for the
> overexposure of the first shot seems logical. And in the second shot, it
> was bulb mode exposure, so lightmeter is out of the picture.
Basicly, as I see your situation, the main problem you seem to
have encountered (and learned from, too ;^) is that your meter
(as all meters) offers the exposure which will yield a "standard
scene/18% grey" rendition. What you have is a predominately dark
scene - so the meter suggests excess exposure to ensure the 18%
"average scene" rendition.
The comments on film repricocity are also relevant here for
exposures longer than some particular time interval, depending
on the film. For longer exposures, it is usually better to extend
via larger aperture (up to that needed for required depth of
field) rather than longer time, if you can.
Knowing this tendency of meters allows the photographer to
"compensate" by over-riding the meter in non-average conditions.
If the scene were excessively bright (as when a light sky is a
large portion of the frame), one would use this compensation in
the opposite direction - increasing the exposure to allow the
less bright portions of the scene to get enough exposure. If your
camera (I forget what you have) has an exposure compensation dial,
this makes it a simple matter to deal with these "non-average"
situations. Plus to add & minus to reduce exposure. The camera
will then adjust one or the other exposure parameter.
Bill
---------------------------------------------------------
Bill D. Casselberry ; Photography on the Oregon Coast
http://www.orednet.org/~bcasselb
[EMAIL PROTECTED]
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