Re: figuring pinhole exposures

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From: Gordon J. Holtslander (holtsg@duke.usask.ca)
Date: 04/15/02-10:01:19 AM Z


Hi:

Yes you do have to correct for reciprocity. I compensate for reciprocity
by finding an effective ASA that consistently gives me the results I need.

I just set my meter to the appropriate ASA and then use Larry's calculator
table. Its a little bit of work finding an appropriate ASA, but once this
is done it makes exposure pretty simple.

Gord

On Sat, 13 Apr 2002, Diana H. Bloomfield wrote:

> Yes, I'd forgotten about Larry's pinhole calculator. It's incredibly
> helpful. Again, though, I think(?) you have to add for reciprocity failure
> with these calculations, too.
>
> --Diana
>
> "Gordon J. Holtslander" wrote:
>
> > Hi:
> >
> > I use Larry Fratkin's pinhole calculator at
> >
> > http://www.MrPinhole.com/Exposure.html
> >
snip snip snip

---------------------------------------------------------
Gordon J. Holtslander Dept. of Biology
holtsg@duke.usask.ca 112 Science Place
http://duke.usask.ca/~holtsg University of Saskatchewan
Tel (306) 966-4433 Saskatoon, Saskatchewan
Fax (306) 966-4461 Canada S7N 5E2
---------------------------------------------------------


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