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02-13-2015, 05:39 PM   #1
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Is this normal? Bower P-TTL Flash

Hello all,

I have a family event coming up which I will be doing photography for. I have a manual flash but for this event I wanted a dedicated P-TTL flash. I have a Photozuela Montana C600 (which will fall to a back up).

I just received my BOWER SFD926P and have a question about its usage. I was test shooting and noticed the shutter speed is limited while the flash is on hot-shoe. In 'front curtain' shutter speed is limited to 1/90. With 'rear curtain' it's limited to 1/180. Is this normal? I did not see anything in the manual. I do not foresee this hindering my photos but do want to make sure I do not have a faulty unit. Anyone with this flash, please chime in. Thanks!

02-13-2015, 05:42 PM   #2
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It is normal.
02-13-2015, 07:58 PM   #3
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QuoteOriginally posted by boriscleto Quote
It is normal.
1+

It is normal and is probably in your camera manual.


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02-13-2015, 09:26 PM   #4
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QuoteOriginally posted by jaywes Quote
I was test shooting and noticed the shutter speed is limited while the flash is on hot-shoe. In 'front curtain' shutter speed is limited to 1/90. With 'rear curtain' it's limited to 1/180
Are you sure it's that way around? I was recently shooting with the AF540FGZ, moved the flash mode to 'rear curtain' by accident and it would not go over 1/90s.

02-15-2015, 02:20 PM   #5
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Thank you all! Didn't see it in manual but I will check it now.

QuoteOriginally posted by sterretje Quote
Are you sure it's that way around? I was recently shooting with the AF540FGZ, moved the flash mode to 'rear curtain' by accident and it would not go over 1/90s.
I'm pretty sure that's how tho one functioned. Either way I should be ok.
02-15-2015, 02:36 PM   #6
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Front curtain sync should be 1/180, all pentax bodies, at least since the PZ-1 have rear curtain sync at 1/2 front curtain sync speed. This ensures that the shutter is open for the duration of the flash., before the rear curtain starts to close .

If you consider flash duration is 1/180 maximum, to have a rear curtain sync where the flash fpgoudge off then the shutter closes, it has to be at 1/2 the leading curtain sync. This should not be limiting because rear curtain sync is intended to freeze a blur at the instant the shutter closes. So for this you want a relatively slow shutter like 1/30 or something, with the burst at the end of the duration
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