Re: Help Me Pick A Color Film

Do you use the same table for all films? Simmons' large format camera book
lists different reciprocity correction for different films. I know that triX
needs a lot more than Tmax, for instance, but I don't know about differences
among color films.
----- Original Message -----
From: Derek Watkins <100015.635@compuserve.com>
To: <pinhole-discussion@pinhole.com>
Sent: Saturday, August 04, 2001 5:33 AM
Subject: RE: [pinhole-discussion] Help Me Pick A Color Film

> Jeff
>
> For anything longer than 2 seconds (not 5 seconds as I previously wrote)
> Fuji say simply 'Not Recommended'. So I use the following reciprocity
> table, which I tend to use for B/W films, too.
>
> Indicated exposure Multiply by Final exposure
> 1 second x1.25 1.25 seconds
> 5 seconds x1.5 7.5 seconds
> 15 seconds x2 30 seconds
> 45 seconds x2.5 1 min 52 sec
> 2 minutes x3 6 minutes
> 5 minutes x4 20 minutes
> 10 minutes x5 50 minutes
> 20 minutes x6 2 hours
> 40 minutes x8 5.5 hours
>
> So you can see that by working back from my 16 minute exposure, the
> original exposure indicated by my Pentax Spot meter was 4 minutes (at
f/256
> on my home-made 90mm focal length 4 x 5in pinhole camera).
>
> Regards
> Derek
>
> ----------
> From: INTERNET:pinhole-discussion@pinhole.com
> Sent: 03 August 2001 18:12
> To: "'INTERNET:pinhole-discussion@pinhole.com'"
> Subject: RE: [pinhole-discussion] Help Me Pick A Color Film
>
>
> Thanks Derek!
>
> Have you come up with your own reciprocity adjustments,
> or are you using what the manufacturer suggests?
>
> -Jeff
>
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Received on Sat Aug 4 06:48:03 2001