Macro the 1/f rule and flash duration

Started Sep 8, 2008 | Discussions thread
John K Veteran Member • Posts: 7,614
re: HSS pulse modulations - more work is clearly needed

jpr2 wrote: time in your hive, to shoot some at HSS for me?
My choice would be to go through a whole HSS sequence: 1/125, 1/250,
1/500, 1/1000, 1/2000, 1/4000, 1/8000 with either 24ex or 580ex II.

I'll try, but were are in for some odd fall weather for the next week so I don't know when I'll get the chance. If the temps drop too low the beekeeper won't open the hive for me

FWIW: HSS mode will not kick in until after you go above the max sync speed of the camera, so at any shutter speed slower than 1/250 my 40D will tell the flash to fire a single pulse...

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