Flashes VS Strobes

[Youhong]

Flashes use Guide number while Strobes use Power (Watts) to determine their maximum output...

How to convert Guide number to Power (watts) ???

[blazer_workz]

Originally Posted by Youhong Flashes use Guide number while Strobes use Power (Watts) to determine their maximum output... How to convert Guide number to Power (watts) ???

should be somewhere in the manual or spec sheet...
but is it necessary? use a light meter..

[Youhong]

Originally Posted by blazer_workz should be somewhere in the manual or spec sheet... but is it necessary? use a light meter..

You buy me one light meter lor... It is useful to know the maths behind yah...

For example, SB-800 guide number is 38 at 35mm zoom head, I want to find out how many watts equivalent it is compared to a strobe...

[leejay]

Two articles for your references which may help:


http://photo.net/bboard/q-and-a-fetch-msg?msg_id=00AcOr

http://photography-on-the.net/forum/...ad.php?t=24733

[blazer_workz]

Originally Posted by Youhong You buy me one light meter lor... It is useful to know the maths behind yah... For example, SB-800 guide number is 38 at 35mm zoom head, I want to find out how many watts equivalent it is compared to a strobe...

so r u a photographer turned mathematician?

[Scaglietti]

Originally Posted by Youhong Flashes use Guide number while Strobes use Power (Watts) to determine their maximum output... How to convert Guide number to Power (watts) ???

There should be guide number for studio strobes too. Look in the specs sheet, you should see it there.

Ws and guide number are measure of different things. You may not be able to convert directly.

BC