----- Original Message -----
From: "Eduardo Carone Costa Júnior"
Subject: Re: Multiple exposures
> Thanks for the precise explanations. just one more question:
How do you
> determine how many exposures do you need to get it right? My
guess is that,
> on that particular photo, one second exposures wouldn't be
short enough to
> do the trick...
I first decide what aperture I need to secure sufficient depth
of field, or which aperture is best on the lens in question if
DOF is not a consideration. I then meter the scene to determine
the exposure time needed for that aperture.
While I am working this out, I am also determining what shutter
speed would best serve the effect I want to achieve. Do I want
the moving water to be as sharp as possible, perhaps slightly
soft will do.
So, now I have determined the amount of exposure needed, and the
increments that I will be using to get there. Divide one into
the other to determine the number of shutter releases needed.
The complication that arises is that a sort of reciprocity
failure comes into play with this process, so it can be a bit of
a guessing game to get it correct.
William Robb
Remember, the LX Gallery is coming up.
Please see:
http://pug.komkon.org/LX_Gallery/LX_Submit.html
for more information.
-
This message is from the Pentax-Discuss Mail List. To unsubscribe,
go to http://www.pdml.net and follow the directions. Don't forget to
visit the Pentax Users' Gallery at http://pug.komkon.org .
