Re: #25 vs. IR filter

["Russ Rosener" <rrosener@xxxxxxxxxx>]

----------
>From: Hondo <btl3@xxxxxxxxxxx>
>To: infrared@xxxxx
>Subject: Re: #25 vs. IR filter
>Date: Wed, Apr 28, 1999, 1:18 PM
>

>>From what I have read on everyone's websites and here on the list, if an
>87a filter is used, the camera should be set at ASA 25, and just meter
>TTL at f11. Would most agree that this is the general concensus? I'm
>using a BTR filter setup, but haven't actually shot a roll yet with an
>87a. I always use a #25, and manually set the camera at 1/125 @ f11.
>So-so results. Seems like shadier shots are always on the underexposed
>side, and full sun shots lean dangerously close to overexposed, but I
>realize that this is because of my lack of experience.

No, not your exeperience, just the way IR light works! Shady areas tend to
reflect very little IR radiation and usually turn out dark, or thin on your
negative. Other areas tend to reflect immense amounts of IR and will
increase local density no matter what you do. Keep bracketing by at least
one full stop on either side of your metered reading. You should have a good
range of negatives from which to choose. 

As for your Nikon N60, it sounds like a glorified point and shoot camera! I
can't believe the cheap stuff Nikon and other camera manufacturers put out
these days! You found the proper solution: buy used. If enough of us do that
the manufacturers may start to ammend some fo the foolish design decisions
they've made recently. This seems to be particularly true for those of us
who shoot IR or slow speed films like AGFAPAN 25 and KODACHROME 25. 

Russ Rosener
St. louis Community College 

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