Re: IR light meter

[Otto Giesenfeld <otto.giesenfeld@xxxxxxxxxxxx>]

--On den 26 februari 2000, 11:06 -0800 Foamb <cpurdum@xxxxxxxxxxx> wrote:

> Has anyone tried this? I'm thinking of using a Gossen Luna Pro digital
> and trying it out unless someone has experience with the disassembly of
> meters and can recommend a better choice. The pentax digital spot was
> mentioned but required considerable effort to disassemble and modify,
> not to mention that they aren't exactly cheap.
> 

The Gossen Luna-Pro digital (at least the F version) is in fact
infrared-sensitive. You could cut out a 16mm x 33mm strip of exposed and
developed E6 film, fold it in half and insert it next to the dome for
incident-light metering. This should work as a filter that you can slide on
top of the light opening when needed, giving you quite good reflected-light
IR metering once you have established the proper correction factor. (I only
tried this on my meter after seeing your post, so I cannot comment on using
this setup in practice. Not being able to do incident-ligt metering for IR
is of course a limitation, but probably not a severe one.)

Best regards,

Otto Giesenfeld
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