Indeed the true way to compare flash light output is the amount of
energy in the flash of light.
This is independend of the way the light is directed, bundeled or difused.
The basic principle of this kind of flash guns is:
1. The voltage of the battery is boosted to a high voltage on a
I'm curious about the difference in power between my on camera flashes
and studio flashes. When I look for specs on the AF540 I can find
guide number, but I can't find it in Watt Seconds. Anyone know where
to find this number?
--
Larry Colen l...@red4est.com sent from i4est
--
PDML
...@red4est.com
Subject: How many watt-seconds is the AF-540?
To: Pentax-Discuss Mail List pdml@pdml.net
Date: Friday, December 25, 2009, 8:54 AM
I'm curious about the difference in
power between my on camera flashes and studio flashes. When
I look for specs on the AF540 I can find guide number, but I
...@red4est.com
Subject: How many watt-seconds is the AF-540?
To: Pentax-Discuss Mail List pdml@pdml.net
Date: Friday, December 25, 2009, 8:54 AM
I'm curious about the difference in
power between my on camera flashes and studio flashes. When
I look for specs on the AF540 I can find guide number, but I
can't find
guide number
Watt Seconds
Effective Watt Seconds
BCPS (Beam Candle Power Seconds)
16x the light. However its a largely irrelevant measure; GN is completely
dependant on any sort of reflectors, diffusers, zoom heads etc etc. So on a
white lightening, this figure changes with anything you put
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