Bertil Holmberg wrote:
Does anyone have experience of LED lighting panels in photography?
Although there are commercial products available, it should not be that
difficult for the electronics buff to make a couple of panels quite
cheap. White high intensity LEDs are avaialble for about $50 per 100
and that should be enough for small object photography, I think. With
25-50 light sources mounted close together, a diffusor seems unnecessary.
What kind of light intensity would be required at a distance of 50 cm
(20 inches)? I'm afraid that I know little about the physics involved
apart from that some of it is measured in Candela. Ah, the Wiki says
that a 100W bulb emits about 120 Cd. A 5mm LED can give 20.000 mCd so
100 of the blighters should give 2000 Cd. That sounds pretty intense,
does't it?
Your math seems a little off. 100 * 20mCd = 2000 mCd = 2 Cd., I'm
assuming the "m" stands for "milli" or 1/1000th.
rg
Any help is appreciated :-)
Bertil
