Mikkel Høj [EMAIL PROTECTED] wrote:
Just out of sheer interest; is it also this quality of film recorders
that is used in the motion picture industry?
This subject came up once before, and someone said that the recorders used
for motion picture work were actually lower in resolution - 2048
images 4x5.
-Original Message-
From: Arthur Entlich [mailto:[EMAIL PROTECTED]]
Sent: Thursday, September 28, 2000 5:44 AM
To: [EMAIL PROTECTED]
Subject: Re: Measuring resolution (was Re: Real resolution of a 4000
dpiscanner?)
"Hemingway, David J" wrote:
God I hate to allo
Rob,
In my first life here at Polaroid I am the film recorder expert. My gut says
a film recorder might have some problems.
1- all film recorder specs are in addressable resolution not resolvable
resolution. Polaroid makes film recorders that sell from $4000 - $1900, all
of them image 4096 pixels
Rob,
Edmunds did make a USAF target exposed on emulsion. The $100 one (I think) is on
glass chrome plate. In the eighties I built a series of autocollimators as a
part of a research project and may have a spare one of these laying around somewhere
but it probably is cut sown to a 1" diameter
One thing to remember is that the resolution charts were designed to be
set up at a finite distance. The SMPTE target is 26X the lens focal
length and 25X (I
believe) for the 1952 USAF target. At his distance the resolution can
be read directly off the image. The distance is based on
Roger wrote:
I think David is right - I've been using a Polaroid HR6000 (the
$4000 model) for a couple of years now. It works perfectly well for
PowerPoint-type slides on coloured backgrounds, but I've always advised
faculty and students to avoid black text on a white background. The text
is
: Rob Geraghty [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, September 26, 2000 7:52 AM
To: [EMAIL PROTECTED]
Subject: Re: Measuring resolution (was Re: Real resolution of a 4000
dpiscanner?)
Jim wrote:
[snip]
the design of general purpose lenses. Even so, the scanner resolution
can
be calculated but I
Jim wrote:
[snip]
the design of general purpose lenses. Even so, the scanner resolution
can
be calculated but I do not have the equations in front of me. I will try
to find them.
That would be great! Thanks!
The main thing is to get a good sharp image on the film.
From what David is saying,
