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DPChallenge Forums >> Hardware and Software >> SB-600 and SB-900 light outputs
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 04/21/2009 11:47:37 AM · #1
I have both these flashes. Is there a way to figure out the difference in light output between these two flashes? Other than just trying different settings?

I tried firing the flashes on 1/32 power, zoomed to 85mm, and the 600 was about 1/3 stop darker then the 900. As I crank up the power, will this be linear? Will it still be 1/3 stop darker at full power?
 04/21/2009 06:37:24 PM · #2
I remember that I was told to get a flash recalibrate once a year. *shrugs*

It also may have something to do with that the 900 has a bigger head, that is more efficient.
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