thanks G!
paper film average wavelengths for sensitivity seem to fall
in the range of 475 to 500 nm, which is blue-green... it
doesn't look like any appreciable difference would show up if
they were to be inserted in the optimal diameter formulas
because it's so close to green (the
Laura,
For type 55 Polaroid shoot for print at 64 ISO, for negative at 20 ISO.
Gary
- Original Message -
From: Calfee, Laura lcal...@central.uh.edu
To: pinhole-discussion@p at ???
Sent: Thursday, May 30, 2002 5:12 PM
Subject: RE: [pinhole-discussion] begging for wisdom
Shoot
has anyone used ag-plus emulsion to make in camera positive images? i'm
curious how it works with pinhole. thanks in advance
_
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp.
- Original Message -
From: Jim Kosinski mer...@paintcancamera.com
it makes any difference... does anyone know the range of
wavelengths that bw paper is sensitive to?
Both Ilford and Kodak have spectral sensitivity curves for their papers in their
respective sites.
Guillermo
Greg,
The Unicolor roller and drum do a wonderful job. If you are having trouble
fixing you have one of several problems:
1. Insufficient fixer quantity - Use as much fixer as your tube will hoild
without running out the pouring spout. I usually use 8 ounces in these tubes.
2. Weak or
Yes they have both the Hoyas and the Shott listed under commercial
quality bandpass filters in their industrial catalog. They are
unmounted which is not a problem for pinhole or zoneplate.
Howard Wells
Andy Schmitt wrote:
I've been looking for one for a while. The optical UV filters are real
just checked out the link, but that uv pinhole photo is not
unusually sharp... i think he just had a decent pinhole to
start with
the next thought on sharpness is to recalculate the optimum
aperture size formula by substituting the average wavelength
that paper is actually sensitive to in
I've been looking for one for a while. The optical UV filters are real
expensive (+100$). Does Edmunds have the optical grade UV filters at a
decent price?
thanks
andy
-Original Message-
From: pinhole-discussion-admin@p at ???
[mailto:pinhole-discussion-admin@p at ???]On Behalf Of
http://www.naturfotograf.com/index2_PC.html
See the link above for a suggestion that exposing pinhole with nothing
but UV makes a sharper photo. I've been thinking about buying one of the
appropriate filters from Edmund Scientific and trying UV pinhole this
summer. Has anyone done it?
Howard
in the formulas used to determine the optimal pinhole
diameter for a given focal distance the wavelength of green
light seems to be used because it's in the center of the
visible spectrum... would it be possible to get more
sharpness with the same pinhole diameter by changing the
color of the
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