Re: Can Ir get outside of the frame

["Amber" <ambersexton@xxxxxxxxxxxxx>]

Date sent:      	Tue, 2 Mar 1999 10:45:25 +0100 (MET)
From:           	owner-infrared-digest@xxxxx (Infrared-Digest)
To:             	infrared-digest@xxxxx
Subject:        	Infrared-Digest V #69
Send reply to:  	infrared@xxxxx
From:           	Infrared-Digest@xxxxx

>  I shot my first Black and White IR film in 15 years. When I got it
> back I had bracked 1.5 stops from the exposure of my camera. I had a red
> filter on the lense of my Canon EOS 630. I did that just to make sure I
> got something. I was suprised to find that the least exposed was the
> only one that came out at all. I was also very suprised to see that on
> the very exposed frames there was no seperation between them. I mean
> that the IR must have bled between frames. Is this common if you over
> expose? I got a few good pictures and I hope to put up a limited web
> page in the next few days.
> 
> 
>        Jim
> 

Jim,

It isn't the infrared that is getting out of the frame exactly but it is 
the fact the film has no anti-helation coating to keep the light from 
haloing.  This is also what causes the glowing effect.

I tend to like these blurred edges, and often use a torn paper carrier 
when printing IR that is like this, to  make the whole frame a soft 
thing.

In exposing with the normal range of filters, as opposed to the 
opaque kind which I have no experience with, if you bracket, 
bracket under the exposure not over it.  Remember that your meter 
is only reading visible light, and the film is automatically picking up 
more light wave than the meter can see so that necessarily you 
need less exposure than the meter says, so I consider the my 
usual meter exposure to be the highest end of any bracket of IR. If 
it is daytime I may need 1 1/2 to 2 stops under the meter for a 
good exposure

Also about your overexposed negs.  I have found that unlike many 
other films, really dense IR negs can be printed through, although 
of course it is a pain to print for long exposure times.  Many of my 
favorite images come from such negatives, which can have a white 
on white feel.  I encourage you to experiment with them if you have 
no other exposures of frames you like.
Amber
ambersexton@xxxxxxxxxxxxx
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