From: mark@xxxxxxxxxxxxxxxxxxxx
Another crazy idea. Anyone ever use a pinhole camera and add flash to the
scene to cut down on exposure time? Full power on the strobes should help a
great deal, even though the flash is only there for a small part of the
exposure time. I think it would likely work a bit like some stuff I do
working at night. There for some things you can set the exposure for say 15
seconds or so, and then pop the flash from 2 or 3 places during the
exposure. A long enough exposure gives you the sense of night and the flash
gives you the sharp detail of the image. That is as long as nothing moves.
lol
Sounds like you're making yourself a omework list Mark ;)
Have a peek here too:
www.owlnet.rice.edu/~dodds/Files231/pinhole.pdf
- it has some nice images illustrating diffraction limits of pinholes.
There's plenty of backgroung maths there too, but the images make it clearer
what is going on
My graph takes all that into account, but it probably needs images similar
to those in this pdf to explain it better.
Pinholes are fun to experiment with, and digital makes it a whole lot
quicker and cheaper to make your discoveries ! I prefer larger format films
for pinholes, not quite up to Guys formats though
http://www.zeroimage.com/Guy/PinholeHotel.html
k
