On 18 Nov 2005 02:17:54 -0800, "Scott W" wrote:

Well, this is the point. When I make paper negatives, the image has a
good definition, when I make 35mm ones they are all blured, nothing
good. You say, then, that it is almost imposibble to obtain a detailed
35mm neg from pinhole? 4x5, never tried. What about the costs, are
they expensive? Then, when you process them, you use a developer
concentration like the one for paper? To enlarge it I need a specif
enlarge or I need only a different film-holder?


Dada wrote:
I am using 35mm films in small boxes, used as pinhole cameras, but I
have some trouble developing them. To do it I use a tank, and putting
every piece inside the spiral require a long time, but that is not the
biggest matter, the biggest one is that, sometimes, could happen that
two pieces of film overlap and the image is lost. Anyone of you that
has some experience with developing film pieces could help me?
Thanks a lot.

You might want to try using 4 x 5 sheet film, it is much easier to make
a pinhole camera with a larger piece of film. I use to shoot a fair
bit of 4 x 5, I had a darkroom right by where I shot so for each shot I
would dump the sheet into the tray of developer. At little hand
agitation, a quick dump into stop bath and then fix and I had my
negative. Well after a bit of rinsing. The point is it was very easy
to do, no loading into a tank. You do need a very dark room to do this
in however.

The problem with 35mm and a pinhole camera is that by the time the hole
is small enough to start to get a clear image diffraction blurs it out
again, this is much less a problem with a larger piece of film

Scott


Scott