Re: .... & reflected vs. incident

[P3D Michael Kersenbrock <michaelk@xxxxxxxxxxx>]

> An incident light meter is particularily usefull in complex lighting 
> situations. Here a 3-dimentional subject may be reflecting light from 
> several ANGLES OF INCIDENCE from a variety of sources. If you are 
> shooting a scene lit with a key, fill, kicker, obie etc., a grey card 
> reading, unlike the incident meter, can't register predictable 
> exposures. 

It seems that one can construe situations where the incident meter will
have problems as well, but I suppose the key word was "predictable" rather
than "correct".  :-)   Anyway....

Might I make the positive suggestion that for those of us with reflective 
light meters, we could use a graycard in the shape of a hemisphere (or a sphere,
although the backside would be wasted).

Get a ball and paint it 18% grey, then spot read off of it, filling the "spot"
with the ball.

Would this be roughly an incident equivalent grey "card"? 

Perhaps a cone would be easier to carry around and to construct from a flat card.

Mike K.



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