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04-15-2014, 08:35 AM   #1
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Pentax 645D high speed sync?

I know there are already a lot of talk about this question. I know there are some leaf shutter lens that allow the pentax 645d to sync in high speed. But what I would like to know is if anyone knows if the 645D is able to high speed sync with regular lens and one of those strobe that are suited for this, I'm thinking about alien bee einstein and about godox.

Did anyone tried this?

04-15-2014, 10:59 AM   #2
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The 645D supports Pentax P-TTL. HSS is primarily a flash feature. With flashes that support both Pentax P-TTL and HSS the behavior should be the same as with the APS-C cameras. There are other systems that are capable of HSS in manual mode IIRC. You may want to have the modes move your inquiry to the flashes and lighting section of this site where the experts hang out.


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04-15-2014, 11:11 AM   #3
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Ok, but 've read that some pentax DSLR can't sync in high speed partly because above 1/125 the sync signal turns off by itself. Does this apply also to the 645D?
04-15-2014, 02:23 PM   #4
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What's your end goal? Are you trying to freeze motion, or shoot wide open in full sun?

04-15-2014, 02:34 PM   #5
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QuoteOriginally posted by polachekphotography Quote
What's your end goal? Are you trying to freeze motion, or shoot wide open in full sun?
Wide open in full sun. Please don't tell me about ND filter. My question is about the technical spec of the camera, not about how to do it.
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