Re: Konica IR versus Kodak HIE

[Richard Fung <rfung@xxxxxxxxxxxxxxxxxxx>]

Hi all,

I'm a little confused as to what settings I should set my camera for in
bright sunlight using Konica IR film. Some of you have told me to use a 29
filter and set my camera at ISO 50. Some have said set it at 8 ISO with a 25
filter. Would this work out about even as the 29 is darker than the 25?
Thanks for your advice...

Richard


At 02:21 AM 9/6/96 +0100, you wrote:
>The Konica has ZERO halo effect because its base is extremely effective
>at suptressing halation. It also is sensitive only to about 800nm,
>while Kodak is sensitive to 900 or beyond, a bit.  So the infrared
>effects are a trifle less.
>
>BUT!  BIG BUT!!! The Konica is virtually grainless.  Because of its 
>lesser IR sensitivity, it is far closer to the effective working
>range of the antireflection coatings on modern lenses. It also is
>closer to the designed useful range of the optical compromises made
>when your lenses were designed. 
>
>AS a result, it should produce less flare and far sharper (grain quality aside)
>images, especially if using complex lenses like zooms.  Konica fairly BEGS
>to be enlarged into murals!  It is REALLY sharp when using simple, highly
>corrected lenses, like the Tessar in my Zeiss Ikoflex.  Provided the wind
>isn't blowing the leaves...  Provided the sun is bright... Provided it's
>sitting on a big firm tripod...  Fotr if the Konica is anything, it's SLOW!
>With a #25 filter, an EI of about 8 is good.  That's 1/30 at f:8, roughly,
>in bright sun.
>
>I have spoken to Kodak and written them over the years aabout their failure
>to produce an IR film with an antihalation backing, something that other
>manufacturers did in the '30's.  I personally hate halation and dark loading
>of 35mm cassettes, so I won't use HIE.  Instead, if the need for speed
>arises, I'll use the new Ilford product.  Kodak makes some brilliantly
>designed films, especially TMX and TP.  Vericvhrome Pan was perhaps
>the finest film ever made.  But I have always considered HIE to be
>laughable.
>
>Regards,
>
>Edward M. Lukacs, LRPS
>Washington, DC, USA     
>
>
>
>
Richard Fung
Planning, Evaluation & Information Systems
University of California, Berkeley
207 University Hall
Berkeley, CA 94720
(510) 642-1198


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Topic No. 19