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Finally - a Possible use for "High" ISO *** with the Foveon!

Started Oct 22, 2020 | Discussions thread
xpatUSA
OP xpatUSA Forum Pro • Posts: 23,016
Re: Finally - a Possible use for "High" ISO *** with the Foveon!

xpatUSA wrote:

I also feel another test coming on ... I have a radiometric meter (reads in W/m2, not lux) and a heat-lamp. It would be a simple matter to interpose my Marumi 700nm and see the difference.

I tried a quick test under a domestic 5000K LED desklamp. With lamp about 10cm from the meter flat window:

Bare: 21.5 Watts/sq.meter

With 700nm IR filter: 3.5 Watts/sq.meter

With Kolari visible filter: 9 Watts/sq.meter

Posted for what it's worth ...

Of course, the spectral radiance of a heat-lamp bears little resemblance to that of a green leaf in full sunlight - maybe I should measure that instead ...

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