Re: B&W IE

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On 14 Oct 96 at 23:52, JoePaduano@xxxxxxx wrote:

> Willem--Minolta does warn about the data backs & they weren't reps. that
> answered the question, they were tech. experts,so I assume they should know
> if their meters give an accurate infrared reading. ( the question was not if
> the meters read infrared , but if it was a reading to base an exposure on )
> Maybe I didn't make myself clear originally.

Sorry I went so strong on these Minolta guys (and you), but even
with simple red filters and ordinary b&w film many cameras don't
read accurately. Bob Neuman/David Ruether on Usenet has vented his 
strong opinion on this inaccuracy more than once....8-)) 
So any IR-inaccuracy is not new. According to this FotoMagazin 
article, linearity beyond a certain fixed calibration/compensation is 
not a problem. And it shouldn't be problem, considering that most IR films 
are (or should be) used in full sunlight, ie the range of EV's is 
quite limited (exept max aperture variations of course).
I even believe the color meter of the Nikon F5 is supposed to tackle 
this problem specifically, at least this has been quoted from the 
mouth of a Nikon rep some months ago. Not sure whether it is 
mentioned in the brochure....anyone? 
On that comment (posted to Usenet), I replied that the color meter
could, or should also be able to see beyond the visible spectrum.
Would be a very nice feature, on the same innovative level as the 
IR-focus of the Konica Hexar.

--
Bye,

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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. 5