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If 1/2 foot-candle is acceptable, then the fixtures can be placed about 36-40 feet apart. For instance, in a parking lot, the diagram at left indicates that there will be about 1/2 of a foot-candle of light at about 18-20 feet from center. even calculating lux this way would be helpfull. Thanks ISO 100 = 100fc, ISO 200 = 50fc, ISO 400 = 25fc, so ISO 800 = 12.5fc. Foot-candle meters read the amount of light striking a surface by having their selenium cell subjected to the same light as the photographic subject is subjected to. Figure 6-13. The utilization curve will determine the amount of light that actually strikes the roadway surface.

OSHA has set regulations on minimum light requirements in workplaces to ensure the safety of those working in areas where a certain amount of light is required to do the job safely and effectively. To switch the unit simply find the one you want on the page and click it. 3 Foot-Candles . - Pavement brightness. Photometric Data Files. I have a digital camera, and I'm trying to figure out the number of lumens falling on a given area. The point represents a calculated 2.95fc, which corresponds to its position between the 2fc and 4.1fc Isofootcandle contour lines (at a 14' Mounting Height). You can also go to the universal conversion page. A foot-candle is the United States unit of measurement of how much light is emitted from a light source. The isochart (or iso-lux/iso-candlepower) is useful for determining how much area a light fixture can cover. Sekonic is a light meter manufacturer who has kindly put a conversion chart on their website to use in converting the values from foot-candle to … Now I need to find the proper number of foot-candles for 1500fps. 2: Enter the value you want to convert (foot-candle). I'm taking a light reading on a 12" by 12" square of white paper at iso 100, I get 1/160 at f2.8 anybody have any idea how to figure out the lumber of lumen or foot-candles?

This is a conversion chart for foot-candle (Photography units). For each step I multiplied the ISO by two and divided the foot-candles by two, because a camera that is twice as sensitive needs half the light for the same stop. utilization for any specific situation is obtained from this curve. Then click the Convert Me button.