Kari Kivisalo wrote:

>Only photometric measurements will
>tell the truth but I leave that to the professionals :)

How about rendering a series of images (with gamma 1), only containig one 
gray value, going from 0 to 1. Display these on the screen. Push the lens 
of a camera, with true the lens light measurement, against the screen and 
measure the brightness of each image. Calculate gamma.

Ingo

-- 
Photography: http://members.home.nl/ingoogni/
Pov-Ray    : http://members.home.nl/seed7/

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