If choosing a xenon flash, GN is a common reference. Come to led panel, there is lm/m and lux. This is a spec. of led panel: LM: 520/m LUX: 1m: 650, 2m:170, 3m:80 Whats EV equivalent of above ...
I am planning on using multiple strips of LEDs to light up a 2 ft x 2 ft x 2 ft light booth for taking pictures of small items. LED output is Cool White 6500k. Digital camera is low cost 5 megapixel ...
I see that some smartphones now have dual LED flash. What exactly is the purpose of a dual LED flash? Anything to do with brightness? What can a dual do that a single flash cannot? Would a triple LED ...