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DPChallenge Forums >> Tips, Tricks, and Q&A >> sb800
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 01/20/2006 09:25:47 AM · #1
To my understanding the sb800 is a ittl flash when used with the proper batteries but to avoid it being triggered by other camera at lets say a event does it have more then one channel? Also lets lay your flash has a FP/guide number of 32 at iso 100 what is the flash range also is there a way to reverse that say if you only know the flash range?

Thank YOU!
Leon
 01/20/2006 11:04:02 AM · #2
Originally posted by LEONJR:
To my understanding the sb800 is a ittl flash when used with the proper batteries but to avoid it being triggered by other camera at lets say a event does it have more then one channel? Also lets lay your flash has a FP/guide number of 32 at iso 100 what is the flash range also is there a way to reverse that say if you only know the flash range?

Thank YOU!
Leon


it is iTTL flash when used with the proper Camera (D50/D70/D200/D2x)
though IF i understand the manual D50 & D70 Must stay on the same channel if they are masters
if you use the SB800 as a master it can have 2 other channels

the GN vs Lenses mm vs Iso is a chart in the manual
(Pg 42 of the manual) or
fstop=GN*'iso sensitivity factor' / (shooting distance m/ft)
where the iso | factors are
25 .5
50 .71
100 1
200 1.4
400 2
800 2.8
1600 4
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