Re: konica 750 development

["Elton N. Kaufmann - Cycloid Fathom Group" <cycloid@xxxxxxxxxxxxxxxxxx>]

At 10:46 AM 6/1/98 EDT, you wrote:
>Elton I am just starting with konica in my noblex...and I am curious what you
>use for developing this film...times etc.....I hope you post that info
>too....thanks...craig hardie austin texas
>
>
Craig:
There are several places cited on the list from time to time that give
time/temp for Konica 750.  Try the list owner's site for example.  I am
processing the 120 rolls I shot on my recent Utah/Nevada trip as follows:

Exposure:
Set my Mamiya 6MF range finder at ISO 25 (the slowest speed it will accept
and then I manually add two stops - so my EI is 6.  Of course I bracket one
stop up and one stop down normally.  The metering is not through the filter
(NTTF) and I use this EI when a #29 Wratten filter is on the lens.  I bump
another two stops up (EI 1.5) with a #87 filter. Very slow!!

Processing:
Xtol 1:2 with distilled water at 75 deg F for 7.5 minutes.
Agitation by two inversions every 30 sec
Tap water stop bath for 30 sec
Two bath Kodak Rapid Fixer fix (3min + 3min)
Tap water wash ten minutes
Photoflo, squeegee and drip dry

Results:
With the #29 filter the one-stop-under frame is rarely (but not never)
printable.
The standard EI 6 frame is usually OK and sometimes superb.
The one-stop-up frame is almost always printable, frequently better than
the standard, rarely too dense.

I can relate the variability to the amount of IR in the scene.  I also
think EI 6 is probably more appropriate to a #25 filter and the #29 needs
EI 4.5 (which I can't do manually on the 6MF).  With the #87 filter, it's a
crap shoot - there's just got to be a lot of IR in the scene, then I get a
very high contrast neg (which is probably what to expect if you look at the
scene in just the 700nm wavelength region.)

I find that this exposure/processing combination gives rather high contrast
negs with the #29 too (higher than HIE @EI 200 TTF with Xtol 1:1 68deg F,
9.75 min.)  

As everyone suggests on the list, you're gonna have to test to get what you
want from your particular shooting style and processing choices.

			Good luck,
					EltonK

Exhibiting fine-art and editorial photography
Cycloid Fathom Gallery
Elton N. Kaufmann, Chairman
P. O. Box 8129
Downers Grove, Illinois 60517-8129
USA
cycloid@xxxxxxxxxxxxxxxxxx
http://www.cycloid-fathom.com/gallery/
ftp.cycloid-fathom.com/group/uploads/

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