At 02:54 AM 10/24/2001, you wrote: >Studio flash manufacturers usually state a guide f-stop, >which is metered with a standard reflector in 2 meters >distance, making studio flash somewhat comparable to each >other.
Except these numbers can be "jazzed" much as stereo power amp output was before the government required them to standardize on RMS (and even then some rate their power into 4 amp loads and others into 8). A flash head can be designed to produce quite a high GN if the reflector is designed to produce a hotter center with relatively rapid falloff. Two flashes with the same w/s and similar circuitry & flashtubes but with different flash patterns will produce markedly different GN ratings. -- regards, Henry Posner Director of Sales and Training B&H Photo-Video, and Pro-Audio Inc. http://www.bhphotovideo.com * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
