Re: IR LIGHTMETER

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

On  7 Oct 96 at 10:02, David.Humfrey@xxxxxxxxxxxxxxx wrote:

> To everyone,
> 
> I have  a MINOLTA IV F light meter.  Is there any way to adapt it so 
> that I can accurately take exposure readings of  IR light only.
> 
> Thanks,  DAVID HUMFREY 

I can only speak for my Gossen Sixtomat Digital (the tiniest digital 
(non-flash) meter in the Gossen program).
For a TTF reading (Trough The Filter) I dial in 400 ASA, and this holds up quite well, 
even with the opaque filters. The EI equivalent with #87C (+5 stops) is 
bang on with 12 ASA. 
Note that even with ordinary red filters you most likely have to dial 
in 400 ASA instead of the 200 that is often recommended for TTL 
readings, simply because inboard camera meters are less sensitive to 
red light than external meters.

Nice thing about this Gossen: it has a sliding dome for incident 
vs reflective light metering. Yet there is even more room for a second 
slide-over contraption; any kind of filter could fit inside this 
sliding rail, and make for an instant add-on filter.

--
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