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Re: [OM] Infrared question number two

Subject: Re: [OM] Infrared question number two
From: "Lama-Jim L'Hommedieu" <lamadoo@xxxxxxxx>
Date: Mon, 23 Jun 2003 19:34:24 -0400
As Bill Cosby would say.

"It's this fast:."

"Wanna see it again?"

I think the "safelight" rules for film are in effect when 1/2 of the 
development time is up, and only for a few seconds.  As I
recall, those allowances are not for loading your reel, nor for indefinite 
period.

"Mend you speech a little, lest you fog your High Speed Infrared."

King Lear



From: "Walt Wayman" <hiwayman@xxxxxxxxx>
> I should have said "many, many years ago."  My brief experiment
> with infrared film was in the mid '60s.  It, like fisheye lenses,
> produces curious and occasionally interesting effects, most of
> which are not especially to my liking, so I haven't had any real
> interest in using it since.
>
> A look back into history, i.e., my Amphoto Lab Handbook, circa
> 1970, shows a daylight ASA speed of 50 for Kodak High Speed
> Infrared Film with a No. 25(A), No. 29, No. 70 and No. 89B
> filter.  But except for the caveat, "Safelight: Total darkness
> required," there are no admonitions about loading and unloading
> the camera in total darkness.
>
> In fact, on the very next page, which is the data sheet for Kodak
> High Speed Infrared sheet film 4143, which has (or had) an even
> higher daylight ASA of 80 with the same filters, there is this
> notation: "Safelight: Total darkness required.  A safelight filter
> Series 7 (green), in a suitable safelight, with a 15-watt bulb can
> be used at 4 feet."
>
> Which leads me to ask:  Just how fast is the current infrared film?
>
> Walt
>
> ---------- Original Message ----------------------------------
> From: Joshua Putnam <josh@xxxxxxxxx>
> Reply-To: olympus@xxxxxxxxxxxxxxx
> Date:  Mon, 23 Jun 2003 09:45:07 -0700
>
> >Walt Wayman wrote:
> >>I haven't shot any infrared in many years, but I don't remember
> >>having to load the camera in total darkness.  I recall buying
> >>the film in 100 ft. rolls and having to roll our own cassettes
> >>in a Watson loader in total darkness, but otherwise, we just
> >>handled it pretty much like regular panchromatic B&W film.
> >
> >Depending on how long ago "many years" was, you might have been
> >using the slower, earlier-generation film that wasn't as
> >sensitive to fogging. Current Kodak High Speed Infrared will fog
> >inside the can if light hits the leader or the felt light trap.
> >Subdued light won't fog much, room light will leave marks all
> >through the roll.
> >
> >--
> >josh@xxxxxxxxx is Joshua Putnam
> ><http://www.phred.org/~josh/>
> >Updated Infrared Photography Gallery:
> ><http://www.phred.org/~josh/photo/ir.html>
> >
> >
> ><
>
>
>
>
>
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