Re: Focusing

[Daniel Cardish <dcardish@xxxxxxxxxxxxx>]

At 09:07 PM 27/9/96 +0100, you wrote:
>       If Konica peaks at 750nm and Kodak extends to 900. Would Konica be
>as sensitive to focusing as Kodak? My lens does not have an IR mark, so
>when I focus I slightly compensate toward the closer distance, (hope I've
>been doing that right)! Would the Konica be more forgiving since it does
>not extend as far?  In other words, should I treat the Konica the same as
>I would Kodak in regard to focusing.
>
>Bobbi

Interesting question.  For 35mm work where I use Kodak HIE, I use a 35 mm
lens and  I never bother about adjusting the focus, assuming depth of field
will handle any discrepancy.  However, when I used Konica 750 with my
Hasselblad and 80mm lens with #25 filter, I DID use the IR focus adjust mark
on the lens, only to find that the pictures were out of focus  (I was using
a live model and didn't want to use too slow a shutter speed, hence I had to
use large lens openings).

I swore that in the future at least where Konica film was concerned, I would
ignore the IR focus mark on the lens, and focus as I usually do.  I have not
used Konica since then  (I much prefer the look and feel of HIE, but thats
an issue for another email).
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Dan Cardish  <dcardish@xxxxxxxxxxxxx>
                        <http://www.spherenet.com/dcardish/photo.htm>
        


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Topic No. 7