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 Lmode 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 Mis 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.

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