Re: B&W IE

[boblong@xxxxxxxxxxx (Robert Long)]

On Sun, 13 Oct 1996 21:57:59 +0100, Gavin Wrigley wrote:

|        Really?? Boy this gets "confusedor & confusedor".  Someone says =
EI
|250, someone says ISO 200. Some say use the filter on the lens before
|metering, some say meter, open up for filter factor and add the filter. =
I

In addition to what George had to say about the problems of using a
"black" filter--which complicates matters considerably vis-a-vis using
a 25 or 29 with TTF (through the filter) metering--be aware that
built-in meters can respond very differently to identical situations.
It seems that some recent models, in particular, attempt to filter IR
out of the light that reaches the meter.  Such cameras therefore have
meters that seem very insensitive to IR, and the EI must be set very
high to compensate.

=46or example I usually use a Nikon FM-2 for HIE.  There seems to be no
IR filtering in its metering system, so I set the EI at 200 and, using
a Wratten 25 or 29 and metering TTF, bracket 0/-1 stop for heavy
foliage and 0/+1 stop for buildings.  Bobbi Doyle, on the other hand,
has posted effective EI settings that look outrageously high to me, so
I assume that her metering includes an IR filter.


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Topic No. 19