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What is the duration of the built-in flash for the Canon M6?

Started 3 months ago | Questions thread
davev8
davev8 Veteran Member • Posts: 4,833
Re: What is the duration of the built-in flash for the Canon M6?

cryora wrote:

I have a Canon M6 (mark 1) and I am interested in trying out some high speed photography using the built-in flash. I am having trouble finding any specs on the flash duration. There is a spec called X-sync that is 1/200 sec, but I presume that has more to do with the timing of the flash relative to the shutter and not the actual flash duration.

yes

I imagine this can be tested with a fan with a known RPM with a speed fast enough to exhibit some blur for whatever the flash duration is, or simply measure the flash with a fast photodiode, but I am not in possession of such tools.

this cannot be answered..flash duration is measured like a shutter speed as a fraction of a second ..the brightness of the flash is fixed ..but the camera/flash gun adjusts the flash output by allowing it to continue  for more or less time  so the flash has to vary the duration time to  change the output..so unless you can set the M6 at like full, 1/2,1/4 etc it may be different every time

a full-sized Speedlight on a full power pop the flash duration may be as long as 200th of a second however at power at say 1/64 it may be 100,000 of a sec

some old pro guns did give the flash  duration at all the manual power ratio in the speck you will just have to use google to try to find this out and buy the speed light that you can find with this info

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