Re: My setup: opinions please

james wrote:
> 
> In article <[EMAIL PROTECTED]>,
> Benthic <[EMAIL PROTECTED]> wrote:
> 
> >no absolutley not!!! you will not lose much intensity through the air.
> 
> Not through the air, per se, but because light loses its intensity
> logrithmically with distance.  There are plenty of situations where a
> dimmer light, closer up, is more efficient than a brighter light,
> further away, because you have to have exponentially brighter light
> sources compared to a linear increase in distance.
> 
> Maybe it doesn't matter for this application, but it certainly is a
> practical problem for photographers.


Intensity at distance d = A (Intensity at distance
0)/(d^2)
where A is a constant