Re: rodinal developer for infrared

[boblong@xxxxxxxxxxx (Robert Long)]

On Fri, 13 Sep 1996 12:01:33 +0100, Willem-Jan Markerink wrote:

|So if you mention TTF, you must state whether it was taken with a
|camera or with a handheld meter. And in case of a camera, also
|*which* camera.

Good point.  Since I use older bodies, and my results seem to confirm
that the metering has good red sensitivity with Wratten 25, I don't
think in terms of making any correction for meter loss, but in some
equipment this would be a big mistake.

|> Since this is a subject on which many of us are easily
|> confused, may I suggest that we all adopt that term whenever it's
|> appropriate?  Perhaps unfiltered metering--as with an independent,
|> hand-held meter--should then be referred to as "bare."
|
|Yep, sounds fine to me!
|Only a pity it doesn't have a nice abbreviation....;-)) 

But I notice somebody (George?) already using the term.

Also, the present batch of messages includes one reference to TTL
metering.  TTF and TTL obviously aren't the same thing at all if the
red sensitivity of internal meters is to be recognized.  Perhaps the
very first step all of us should take is to compare Wratten 25
readings bare and TTF both with a hand-held meter and TTL to see just
how the internal metering compares with and without the red filter.

(Now I've gotta find my old Weston, if it still works, or go out and
buy a meter.  Grumble...)
|
|--
|Bye,
|
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|     _/  _/ illem    _/     _/ an    _/  _/  _/ arkerink
|                     _/_/_/  
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|
|
|      The desire to understand 
|is sometimes far less intelligent than
|     the inability to understand
|
|
|<w.j.markerink@xxxxx>
|[note: 'a-one' & 'en-el'!]
|


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Topic No. 19