Re: Polaroid 545 back

Derek:

Do you have similar exposure time information for other ISO's of polaroid
film B&W and color) Thanks.

-Mark
----- Original Message -----
From: "Calfee, Laura" <LCalfee@Central.UH.EDU>
To: <pinhole-discussion@pinhole.com>
Sent: Wednesday, August 29, 2001 5:46 PM
Subject: RE: [pinhole-discussion] Polaroid 545 back

> just what I was looking for. Thanks so much!
>
> > -----Original Message-----
> > From: Derek Watkins [mailto:100015.635@compuserve.com]
> > Sent: Wednesday, August 29, 2001 8:59 AM
> > To: 'INTERNET:pinhole-discussion@pinhole.com'
> > Subject: RE: [pinhole-discussion] Polaroid 545 back
> >
> >
> > Laura
> >
> > Excuse me for butting in. I regularlyuse Type 55 at ISO 25 and use the
> > following reciprocity corrections:
> >
> > Indicated exposure Correction factor Final exposure
> > 8 seconds 2x 16 seconds
> > 16 seconds 2.5x 40 seconds
> > 32 seconds 3x 96 seconds
> > 64 seconds 4x 256 seconds
> > 2 minutes 5x 10 minutes
> > 4 minutes 6x 24 minutes
> >
> > Hope this helps.
> >
> > Regards
> > Derek Watkins
> >
> > ----------
> > From: INTERNET:pinhole-discussion@pinhole.com
> > Sent: 27 August 2001 22:13
> > To: "'pinhole-discussion@pinhole.com'"
> > Subject: RE: [pinhole-discussion] Polaroid 545 back
> >
> >
> > Bill, When you rate Type 55 at ISO 25, is there a need to
> > calculate for
> > reciprocity failure. If so, how do you do so? I've been
> > using Type 55 with
> > my Leonardo with some good results but I've just been guessing at the
> > exposures. I'd appreciate any suggestions you have.
> > Laura
> >
> > _______________________________________________
> > Pinhole-Discussion mailing list
> > Pinhole-Discussion@pinhole.com
> > unsubscribe or change your account at
> > http://www.pinholevisions.org/discussion/
> >
>
> _______________________________________________
> Pinhole-Discussion mailing list
> Pinhole-Discussion@pinhole.com
> unsubscribe or change your account at
> http://www.pinholevisions.org/discussion/
>
Received on Mon Sep 3 04:59:05 2001