No longer synching at 1/125th with 120MF

Discussions regarding Phase One 645 DF / DF+ and Mamiya 645 DF / DF+
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No longer synching at 1/125th with 120MF

Postby NN634807565593583516UL » Wed Sep 04, 2013 6:18 pm


I'm seeing the curtain now on every 2nd shot when using the 645DF + 120MF lens when set to either M or X modes at 1/125 second exposures. It's never been visible before but now, nearly always there. Anything I can do to remedy this?


Vadim :?:
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Joined: Fri Aug 17, 2012 12:29 am

Re: No longer synching at 1/125th with 120MF

Postby Drew » Thu Sep 05, 2013 8:51 am

M mode should not be used with the Focal Plane Shutter and Flash sync.
X is necessary to get correct timing with the flash sync signal.

If you see the shutter using X please contact your dealer.
Ensure the body is running current firmware (2.20) and that this issue isn't specific to the lens or other factors (flash sync cable, wireless sync, flash setting, etc).
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