operation. It synchronizes with the mechanical 2nd-curtain shutter to obtain a slit exposure.
(Note that with CMOS, it is difficult to have an electronic 2nd-curtain shutter. Therefore,
only the 1st-curtain shutter is electronic.)
As a result of the electronic 1st-curtain shutter, the [Silent shoot] Modes 1 and 2 make
the shutter-release time lag shorter and reduce shutter-cocking noise. Mode 1 enables
continuous shooting at approximately 6 fps and is quieter than ordinary, non-Live View
shooting. Continuous shooting is not possible with Mode 2. With Mode 2, shutter cocking
does not occur after shutter release, but only when the shutter button is SW-2 OFF. At
most, only the shutter curtains make noise, and the shutter sound during the exposure
can be limited to the quieter mechanical 2nd-curtain
shutter. Live View Function with the EOS-1D Mark III had
the shutter closing after the shutter release before the
start of the exposure. This caused shutter-release time
lag and shutter-cocking noise.
Pressing the AF-ON button pauses the Live View
Function; the reflex mirror goes down and the camera
executes AF. Letting go of the AF-ON button resumes the
Live View Function. With C.Fn III-6, the set AF mode and
AF point (automatic selection possible) will be applied
during AF while one holds down the AF-ON button.
Note that during this time, there will be no Live View Function image displayed since the
reflex mirror will be down. Since no AF points are displayed on the screen with Live View
Function, positioning the magnified display's focusing
frame at the center and selecting the center AF point for
autofocusing is recommended. During AF operation, shut-
ter release is not possible. One must first release the AF-
ON button and wait until the image with Live View
Function is displayed, then shoot.
With the CMOS sensor's electronic 1st-curtain shutter, shooting is possible while the
image with Live View Function is displayed and the mechanical 1st curtain is open. The
mechanical 1st curtain need not be closed in order to shoot. This eliminates the
mechanical 1st curtain's shutter sound at SW-2 ON which occurs with the EOS-1D Mark III
during Live View Function. Silent shooting is therefore possible.
As in the case of the EOS-1D Mark III's Live View Function, the exposure is controlled
with the mechanical shutter's 1st and 2nd curtains. Set to "Disable" when using a TS-E
lens shifted up or down or when using an Extension Tube. If one sets Mode 1 or Mode 2
when using a TS-E lens and a shutter speed of 1/2000 sec. or faster, the small slit created
between the electronic 1st-curtain shutter and mechanical 2nd-curtain shutter will be in
the same orientation as the optical axis, resulting in underexposure or overexposure.
III. PERFORMANCE
Silent Shooting
C.Fn III-6
AF During Live View Function
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