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July 8th, 2007, 11:42 PM
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#1 |
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Major Player
Join Date: Jun 2007
Location: Great Neck, NY
Posts: 291
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Lumens, to F Stop?
Anyone know a general way to calculate the f stop of a given light if all you know is the Lumens at a given amount of feet/meters? given a steady speed and iso rating?
I am trying to determine the ratings of some constant light sources and many only have lumen, or lux. Thanks. Stephen Eastwood http://www.Stephen Eastwood.com |
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July 9th, 2007, 11:41 AM
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#2 |
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Major Player
Join Date: Jun 2006
Location: Shenzhen, China
Posts: 781
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Stephen,
Take a look at this and see if it's what you want: http://www.answers.com/topic/foot-candle?cat=health It's a great question though for sure. |
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