Archived posting to the Leica Users Group, 2000/06/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 9:12 PM +0200 6/19/00, Robert Appleby and Sue Darlow wrote: >>>>>>> >There is no great mystery here. If you need one candle to get the shot with >a Noctilux wide open under a certain circumstance, you'll need 2 candles >with a Summilux. > ><<<<<<< >4 I think. Intensity = something squared? As your kids grow, you can use >slower and slower lenses for their brithday cake shots - f4.0 is sufficient >when they're 64 years old - enter the tri-elmar! >Rob. >Robert Appleby and Sue Darlow >Via Bellentani 36 >41100 Modena >Italy >Tel/fax [39] 059 303436 If you have one candle, and can make the shot with a Noctilux, you will need 2 with the Summilux (which has an entrance pupil approximately 1/2 the area of the Noctilux, both wide open). If you move twice as far away from the candle, you will need either 4 candles or EI12,800 film or.... Intensity varies as the inverse of the square of the distance. * Henning J. Wulff /|\ Wulff Photography & Design /###\ mailto:henningw@archiphoto.com |[ ]| http://www.archiphoto.com