Re: umm (ortho-litho development)

Hi:

I use LC-1 and ortho film too. Its very good. However it is slow. An ASA of 1. I've used a
12 X 18 camera. It ended up having an f stop in the range 0f 300. This translates to an
exposure of an hour on a bright sunny day for one picture.

The resulting prints are worth the wait. 12 x 18 contact prints are absolutely stunning!

Try and determine what the largest acceptable pinhole is, or maybe try using a zoneplate this
could minimize exposure time.

A technique that I've read about, but haven't tried is flashing or prefogging the film. A low
even exposure below the film's base exposure sensitivity is supposed to result in an increase
in the films sensitivity. This usually results in some fog and a loss of contrast, but I think
this can be easily compensated for with ortho film.

Gord

On Mon, Mar 04, 2002 at 02:11:12AM +0000, Bill Finger wrote:
> Date: Mon, 04 Mar 2002 02:11:12 +0000
> From: Bill Finger <finger0101@hotmail.com>
> Subject: Re: [pinhole-discussion] umm (ortho-litho development)
> To: pinhole-discussion@pinhole.com
>
>
> I have just been using this formula. I got it out of the Christopher James
> book. It does yield very good continuous tones. I am enlarging negs using
> Arista lith film. A friend of mine was so impressed with it he is planning
> on building a 16x20 pinhole camera and using the arista film.
> -Bill
>
> >From: JMM1987@aol.com
> >Reply-To: pinhole-discussion@pinhole.com
> >To: pinhole-discussion@pinhole.com
> >Subject: Re: [pinhole-discussion] umm (ortho-litho development)
> >Date: Thu, 21 Feb 2002 23:06:47 EST
> >
> >Use Google and look for Soemarko's LC-1. It'd designed to yield continuous
> >tones from Ortho Litho film.
> >
> >John
> >
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Received on Mon Mar 4 11:42:52 2002