[filmscanners] RE: 3 year wait

["Kapetanakis, Constantine" <KAPETAC@polaroid.com>]

Besides the 4K vs 8K Film Recorder addressable resolution a very importand
specification value is the spot size of the electron beam. The film recorder
will give you 4K worth of dots but if the spot size of each dot is large you
will get a lot of pixel "overlap" that will limit your resolution on film
below the 4K or 8K level.

-----Original Message-----
From: Lloyd O'Daniel [mailto:lodaniel@bham.rr.com]
Sent: Friday, May 10, 2002 4:53 PM
To: KAPETAC@polaroid.com
Subject: [filmscanners] RE: 3 year wait


I think the same convention applies to Kodak Pro Photo CD. You can get
2x3K or 4x6K from 35mm or 6x9cm, but the ppi's are greatly different. If
you do a 6x6, you get 2x2k or 4x4k with wide black side borders, as I
understand.

Lloyd


-----Original Message-----
From: filmscanners_owner@halftone.co.uk
[mailto:filmscanners_owner@halftone.co.uk] On Behalf Of Austin Franklin
Sent: Friday, May 10, 2002 11:51 AM
To: lodaniel@bham.rr.com
Subject: [filmscanners] RE: 3 year wait



> When I say "4K", it means an image of 4096 x 2731, nothing more. My
> film recorder can do 4K or 8K resolution.

I guess that's the root of the issue I have.  It's the same as calling a
monitor X by Y resolution.  Resolution is really not a good word in this
case.  Resolution, in the digital imaging field, means so many
somethings (Ds, Ps, Ss or whatever) per inch.  Inch is a standard unit
of measurement. Apparently in "film recorder speak", the unit of measure
is the long side of a 35mm piece of film (like in monitor speak, it's
the physical size of the monitor)!  Not, in my opinion, a very good
metric.

How does this work between different film formats?  You kind of
discussed this, but didn't give the "terminology".  What if I am
recording a 6x6 with an "8k" film recorder, that gives me 8k over a 6cm
spread, right?  But the same recorder used with 35mm film, gives me 8k
over a 3.6cm spread?  Same film recorder terminology ("8k"), but the
ACTUAL resolution is entirely different (3555 vs 5333).

BTW, thanks for the write-up on film recorders.  Not an item I've ever
been involved with, but certainly interesting to know something about.

Regards,

Austin

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