Reference Manual

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The Phase One P+ back also supports mechanical Hasselblad
cameras such as the 501 CM and 503 CW. These cameras are
operated in single shot mode via the shutter release button or a
standard cable release.
Please note that the Phase One P+ back should not be mounted
while the camera is set to mirror up.
Also make sure that the lens is not jammed or locked open on
the “B” setting when connecting the flash sync cable to the
Phase One P+ back.
If you are using a mechanical Hasselblad you should set the
Shutter latency to ”Short latency”
It is possible to use ”Long latency” mode on Mechanical
cameras, but precautions must be taken not to trigger too fast.
To ensure capture reliability, we recommend that you look at
the green LED on the back of the camera back while you slowly
press the mechanical trigger on the camera body.
You can safely press the button all the way in the moment the
LED flashes.
”Mirror Up” is not supported when using "Long Latency".
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