Mamiya 645DF/DF+ sync speed

Discussions regarding Phase One 645 DF / DF+ and Mamiya 645 DF / DF+
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Mamiya 645DF/DF+ sync speed

Postby NN201134UL1 » Mon Aug 03, 2015 9:03 am


I am looking for info regarding sync speed of Mamiya 645DF/DF+ with LS lenses and Aptus 22 digital back .

Also, does an upgrade to a more recent back (Aptus II, ...) change the max sync speed with LS lenses ?

Best Pierre W
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Joined: Sat Jan 01, 2011 12:25 am

Re: Mamiya 645DF/DF+ sync speed

Postby PhaseoneUser55657 » Mon Aug 03, 2015 12:52 pm

With a LS lens you should be able to use any shutter speed up to 1/800. If you have the vertical grip I believe that allows you to go up to 1/1600. I would also look at the specs for your stobes, in terms of T.1 and T.5 to see where they fit in with respect to sync speed.

I don't believe the back would affect the sync speed.

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Re: Mamiya 645DF/DF+ sync speed

Postby Ulf » Tue Aug 04, 2015 11:01 am


1/800 is supported on all backs.
In order to use 1/1600 you have to have:
Leaf Credo
Phase One IQ
Leaf Aptus-II (which have the extended support)
Phase One P65+/P40+ (which have the extended support)
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