Re: rodinal developer for infrared

[Kayo Matsushita <kayo@xxxxxxxxxxxxx>]

At 14:37 -0400 9/13/96, JoePaduano@xxxxxxx wrote:
>Kayo--My mistake regarding asa and developing times. I'm on vacation this
>week, so I blame my error on brain freeze. What I meant to say was that mos=
t
>of the time, exposures with infrared film are bracketed, which is the
>equivalent of changing the speed of the film. <snip>

Joe, now I see what you meant :-) Yes, I understand bracketing is the same
as changing the EI setting.

>As for
>the orange filter vs. the red filter with Konica, my tests as well as info.
>directly from Konica, the red will increase contrast,as it does with any
>black and white film , even films less sensitive to green or blue light. Ho=
pe
>this clears things up.

I'm still puzzled as to why this happens. Partly because even Konica's
technical datasheet mentions those wavelengths for red and orange filters
right below the sensitivity curve - looking at it, one would think both
have the same effect.


Kayo Matsushita - kayo@xxxxxxxxxxxxx -



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Topic No. 3