Re: B&W IE

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

On 14 Oct 96 at 18:21, JoePaduano@xxxxxxx wrote:

> Willem- You can speak with the experts at Minolta if you like, and they will
> tell you what I said-- TTL camera meters are not sensitive to infrared
> radiation, only visible light. They had a good laugh when I questioned them
> about this, based on some others who have posted here believing the same
> thing.
>                                                                        joe

I don't mind if they laugh....it doesn't make them IR experts....8-)) 
The meter might not be designed for an accurate IR reading without
compensation/recalibration, but it sure does read IR. Such a
sharp-cut IR block filter don't even exist to cut out IR entirely
without affecting the deep red colors.

And hey, since when do we trust official rep's?....;-))


Also, from the German mag FotoMagazin 8/95, the recommended ASA
settings for Konica/Kodak, the Heliopan RG 715 filter (88A) and
three different generations of cameras:

xxxxxxxxxxxxxxxxxxxxxx
Non-AF generation:
Canon AE-1/A-1
Minolta X-300/500/700
Olympus OM-Series
Nikon F-301/FA/F3
Pentax Super A/LX

ASA: 160/800

xxxxxxxxxxxxxxxx
Focus assist generation:
Canon T80
Olympus OM 30
Pentax ME Super F
Nikon F3 AF

ASA: 250/1250

xxxxxxxxxxxxxxxxxx
AF generation:
EOS
Minolta AF/Dynax
Nikon F801/50/70/90/4 (latter with partial and matrix metering)

ASA: 400/2000

xxxxxxxxxxxxxxxxxxxx

These numbers are based on various IR workshops. 
FWIW: the current Heliopan brochure uses the same pictures as are 
shown in this FotoMagazin article.

I really wonder whether those Minolta rep's ever had an opaque
filter in their hands. It wouldn't suprise me if they think about 
heat if one mentions IR.

PS: If you speak to them again, ask if they already include a warning
note about the pre-installed (pre-cut) databack on the non-databack
7si/9xi....;-))

Willem (who's laughing last and best) Jan

 

--
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. 16