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Difference between Field Diamter & Beam Diameter?


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#1 EDDUS RAY

EDDUS RAY
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Posted 24 March 2012 - 04:04 PM

I was looking at the photometric data for the Source4 and it displays two different beam diameters for the light.. Does anyone know the difference between Field Diameter and Beam Diameter?

http://www.jfrost.co...al/S4_26_vE.pdf

thanks.
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