[filmscanners] RE: 3 year wait

["Laurie Solomon" <laurie@advancenet.net>]

Austin,

I am not familiar with the internal workings of film recorders to claim
knowledge; but I have discovered that different 4K film recorders can have
different size lights which effect the brightness and the amount of detail
that the film recorder sensors can pick up - thus the actual effective
resolution the recorder has.  I believe that the 4K figure is in LPI or line
pairs not ppi; and it reflects the traditional printers measures for
halftone screens which are from 1.5 to 2.0 times the number of raw
undithered non-halftoned pixels per inch, dots per inch, or samples per inch
as measured along the long side of the film..

-----Original Message-----
From: filmscanners_owner@halftone.co.uk
[mailto:filmscanners_owner@halftone.co.uk]On Behalf Of Austin Franklin
Sent: Sunday, May 12, 2002 9:47 AM
To: laurie@advancenet.net
Subject: [filmscanners] RE: 3 year wait



> Am I then incorrect in my thinking that the 4K figure for the
> filmrecorder is in ppi?

It appears to me that the 4k figure for the filmrecorder is simply the size
of the sensor, and it doesn't relate to any PPI....and when recording to
35mm, you get 4k on the long side, and when recording to 6cm film (say 6x7)
you get 4k on the 7cm side of the film...

At least that's my understanding I got from the discussion with Mac.

Regards,

Austin

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