Focal Plane Shutter and Leaf Shutter Lenses | XF Camera System
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Phase One Focal Plane lenses
The XF camera has a build in focal plane shutter (FPS).
The range of the shutter is 1/4000s to 1 hour (determined by
the specific IQ back used), but flash sync is limited to a maxi-
mum of 1/125th of a second Shutter Speed.
Schneider Kreuznach LS lenses
The Schneider Kreuznach lenses have a build in leaf shutter
(LS). The Leaf shutters have a capability to synchronize flash
up to 1/1600th of a second Shutter Speed.
If using LS lenses, the camera will indicate if LS or FPS is active
by displaying it on the top screen. Priority of which shutter you
wish to use can be set in the Camera Operation menu on the
top screen, or from the XF menu on the IQ digital back.
Advantages of FPS
One notable advantage of FPS is ability to shoot up to a
1/4000th of a second.
Another advantage is the shutter response time, which is al-
most twice as fast as the Leaf shutter.
This means that if you are photographing objects or persons
within range of the FPS flash sync speed, or without flash, you
will be able to get a notable faster response to the finger press
of the shutter release using FPS.
Advantages of LS
If you want to synchronize at a Shutter Speed faster than 1/125th
of a second, the LS lens shutter can facilitate your requirement.
Another advantage of the LS is less vibration during the cap-
ture due to the circular movement of the shutter.
The issue of vibration however, is addressed even on non-LS
lenses with the XF vibration delay feature of the XF camera
operation menu, available on the top screen.
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