- Original Message -
From: Richard M. Koolish kool...@bbn.com
For a flat film plane, the light from a pinhole falls off as the forth
power of the cosine of the angle from the center of the image. One
factor
of cosine squared is due to the increasing distance from pinhole
- Original Message -
From: Richard M. Koolish kool...@bbn.com
To: pinhole-discussion@p at ???
Sent: Friday, December 14, 2001 7:42 AM
Subject: Re: [pinhole-discussion] Jeff Dilcher's photos - questions
What the heck is inverse quadratic diminution? Maybe I shouldn't ask!
I
What the heck is inverse quadratic diminution? Maybe I shouldn't ask!
I believe you are seeing vignetting. I it seems more pronounced on
large format cameras with a short focal length.
For a flat film plane, the light from a pinhole falls off as the forth
power of the cosine of
- Original Message -
From: Jeff Dilcher dilc...@hiddenworld.net
What the heck is inverse quadratic diminution? Maybe I shouldn't ask!
Inverse quadratic sounds to me like Inverse Square Law, as for cubic
diminution, never heard of that before?
I believe you are seeing vignetting. I
Hello:
This is an analytical question, not a criticism.
On some of Jeff's photos (all very nice, by the way), I see a round central
region of brighter...uh, exposure, for lack of a more eloquent term.
Some don't have it.
Is that vignetting due, or is it the inverse quadratic or cubic
