Re: Using 89B Infrared Filter with Regular B&W films

[Susan Myers <semyers@xxxxxxxxxxx>]

At 12:15 AM 2/11/97 GMT, you wrote:
>Rolland Rainbow Elliott wrote:
>> I tried taking some landscape shots the other day with a VERY dark red
infrared
>> filter made by B+W.  I think it's equivalent to a Kodak Wratten 89B filter.
>> I was using Tmax 400 film pushed one stop to 800. I was hoping to get an
>> almost black sky with very white clouds.
>> However when I developed the negatives the shots with the filter were not
>> exposed at all, and the negatives were completely clear.
>> My guess is that Tmax 400 film isn't very sensitive to red light.  I'm
pretty
>> sure that my camera (Nikon N90s) would correct for the filter factor via
>> throught he lens metering.
>> Can anyone reccomend a regular B&W film that could be used with this filter
>> to get unrealilistic contrast between the sky and clouds?  Or maybe my
>> technique needs improvement?

Hey there--just trying this out. . . first posting after the bio from a
long-time lurker. . .

I just shot a roll of T-max myself, for my photo project for a Graphic
Comm. class I'm taking. . . I have a cokin red filter (#3?) which is the
equivalent of a Wratten 25, and the shots I took with the filter look very
similar to those taken w/o the filter. I took them last Friday, on an
absolutely gorgeous day here in SC, with bright blue skies. . . at any
rate, in ONE picture I can see a noticable difference in the sky--it's
about 2 shades darker. The building (brick) came out a little paler than in
the shot w/o the filter, but the shots didn't really seem all that much
better for having taken them through the filter. This was also true for the
cokin blue filter I used to shoot some lake scenes (I think the # is. . .
well, I can't find it. It wasn't as deep as the red, I know that much. . .)

I'm hoping they'll let me play with IR in the photo class (this
summer?)--maybe I can get a grant to do "research" with it. . .

Any other recommendations for "regular" B&W film re: noticable effects with
a red filter?

BTW, I'm stuck using a beaten-up Pentax K1000 because my poor old Miranda
finally kicked the bucket (moment of silence, please), and my filter
carrier doesn't fit the width of the Pentax's lens, so I had to hold the
filter up by the edges--very cumbersome, don't recommend it with a
completely manual camera. . .

Thanks for all the great advice and tips I'm getting from the list, BTW!

Sue Myers
Clemson University, South Carolina, USA

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