IR-sensitive spotmeters (was: Melles Griot filter info

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

On  1 Mar 00 at 12:47, Foamb wrote:

> well, the article stated that (in the meters he was using) there was a
> light blue infrared blocking filter in front of the photo diode and thus
> he could not get accurate readings using the method of placing a #87
> over the front of the meter. He disassembled the meter and replaced the
> IR blocking filter with the #87 and the Melles Griot 03SWP622 to limit
> the meter to reading light only in the film's (HSI, HIE) sensitivity.
> The only meter that was specifically mentioned was a Pentax digital spot
> meter, and that it was difficult to modify. He said that he had modified
> several other incident and reflected meters using this method. The main
> point was that the modified meter would give accurate readings in dim lighting.

Mmm....this raises the question which of the digital spotmeters uses 
a silicon cell, just like the Gossen Sixtomat Digital.
I have a digital Soligor, but the design and LED-readout suggest that 
it is from a previous era....silicon cells sound more modern.

Of course, for such 'see-through' meters, you need to perform
surgery, to mount the IR filter right on top of the sensor
(otherwise you can't see through its viewfinder!), but that seems
the least of the hassle.


--                 
Bye,

Willem-Jan Markerink


      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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