> > divided by its focal distance at infinity.
>
> The other way around, actually. Focal distance at infinity divided by the
> apparent diameter. I know that is what you meant, but thought to mention it
> for clarity sake.
>
> Guillermo
Thanks Guillermo,
- Original Message -
From: "Joao Ribeiro"
> I read somewhere that the f stop is actually the "apparent diameter" of the
> opening of the lens when viewed by the front side
Joao,
You are correct, that apparent diameter is called entrance pupil and
is the virtual image of the di
Contact pinhole resource. they can arrange it. Also, I too was a precise
pinhole nerd who did not dare to err. But the sharpness of the pinhole has
very very wide latitude. At least try one your self to see if you are happy
with the result.
- Original Message -
From: Thomas Harvey
To:
Sen
Hi,
There are here in Belgium, two girls who take pinhole photographs
with a big trailer +/- 2X2X3 metres as a camera ( like a mobilhome
).
They use cibacrome paper and give hudges color pictures. Their names
FELTEN Christine and MASSINGER Véronique.
Michel dusariez
Several years ago, ther
Hi again:
The first question should be what are you going to do with the scanner?
If you simply want something to scan images to put on web pages you can
use a fairly inexpensive one.
If you want to use it for some kind of digitally based reproduction
you need to consider what kind of resultion
We have an epson 1640 SU photo scanner at work. It comes with a
transparency unit that will do up to 4x5. Good quality scanner 1600x3200
hardware resolution with 42bit color depth.
Good scanner at reasonable price US$369.00
Gord
On Sat, 21 Jul 2001 dibas...@aol.com wrote:
> I am in the proces
Hi:
I use Dave Soemarko's LC-1 low contrast developed with my ortho (CGP)
negs. Its a simple developer one can mix themselves. See:
http://hometown.aol.com/fotodave/Articles/LC-1.html
This developer is mixed in two parts to control contrast. You can get
very precise contrast control with it.
S
I'm getting too old. The following should read Ilford Sporti camera
. . . Dacori might be the lens -- not of much use now.
TH
I am in the process of converting an Ilford Dacori 6x6 camera into a
pinhole camera. Everything is ready to go -- except the pinhole
aperture.
The focal length i
