Yes, it pulses during the exposure in Super FP mode. The flash duration is
20-40 milliseconds. That way as the slit window passes over the film, the
flash is putting out essentially continuous light. Also, a Super FP flash
pulse is triggered when the first curtain is released, whereas normal flash is
triggered when the first curtain completes it's opening. If you shift to
normal OTF flash, the duration is cut to 25 microseconds to 1 millisecond.
I don't know how many other cameras offer this, but the Leica M7 also has the
"HSS" (High Speed Synch) feature when you use a Metz 54MZ3 flash up to 1/1000.
I found my info in an OM-4Ti brochure. Peter's got it here:
http://www.deakin.edu.au/~peterg/brochure_pdfs/om4tichamp_0886D.pdf. A
brochure from 1992 says the same thing.
Skip
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Please reply to skipwilliams at pobox.com
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>
>Subject: [OM] F280 FP
> From: Matt BenDaniel <matt@xxxxxxxxxxxx>
> Date: Sun, 27 Apr 2003 02:58:54 -0400
> To: olympus@xxxxxxxxxxxxxxx
>
>How does the F280 work in FP mode?
>Does it flash at a rate of 40000 times per second during the flash duration
>(e.g. 1/50 second)?
>
>Is there a book on OM equipment that contains detailed technical information
>like this?
>--
>Matt BenDaniel
>matt@xxxxxxxxxxxx
>http://starmatt.com
>
>
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