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Getting Started
2
Using the Lens Shutter of the LS Lens
The PENTAX 645LS lenses have a built-in leaf shutter which
allows for high speed flash synchronization.
When using a leaf shutter lens, set the shutter speed ring on the
lens to LS.
Note that the following restrictions apply when using a leaf shutter
lens.
• The shutter of the lens cannot be used during Live View.
• The camera operates in L mode regardless of the exposure
mode setting on the camera.
• The difference from the proper exposure is not displayed.
• [LS] is displayed for the shutter speed.
• The proper exposure is not obtained even when M is pressed.
• EV Compensation is not available.
• Setting the shutter speed ring to LS when EV Compensation
is set cancels EV Compensation.
• AE Lock is not available.
• Setting the shutter speed ring to LS when AE Lock is set
cancels AE Lock.
• Continuous Shooting, Self-timer (2 sec.), Remote Control (3
sec. delay), and Remote Continuous Shooting of the drive
modes are not available.
• Setting the shutter speed ring to LS when Self-timer (2 sec.)
is set switches the shooting mode to Self-timer (12 sec.).
• Setting the shutter speed ring to LS when Remote Control (3
sec. delay) or Remote Continuous Shooting is set switches
the shooting mode to Remote Control (immediate release).
• Mirror Lock-Up Shooting is not available.
• Setting the shutter speed ring to LS when the mirror is raised
lowers the mirror.
• Optical Preview is not available.
• If the shutter of the lens is charged in advance, Digital Preview
can be used. (The same applies when using the Digital
Preview to preview the image with White Balance or Custom
Image.)
• Interval Shooting, Exposure Bracketing, and HDR Capture are
not available.
• Setting the shutter speed ring to LS when Exposure
Bracketing or HDR Capture is set cancels the setting.
• Setting the shutter speed ring to LS when Interval Shooting is
set exits Interval Shooting.
• In Multi-exposure mode, the shutter of the lens must be charged
manually for each shot.
• An external flash cannot be used even when connected to the
hot shoe. Be sure to use the sync terminal on the lens.
• An external flash cannot be synchronized even when connected
to the sync socket on the camera.
• The flash mode setting is not applied to LS shooting.