Canon 650D - Manual (Page 340)

340
The EF-S18-135mm f/3.5-5.6 IS STM utilizes a stepping motor that drives
the focus lens. The motor also controls the focus lens during zooming.
1. When the camera is OFF
The motor does not operate while the camera is OFF or when the
camera is OFF due to the use of the auto power off function.
Therefore, users must be aware of the following points.
Manual focus adjustments are not possible.
During zooming, delayed focus will occur.
2. When the lens is in sleep mode
If not operated for a certain period of time, this lens will enter sleep
mode in order to save power. Sleep mode differs from when the
camera is OFF due to the use of the auto power off function. To exit
sleep mode, press the shutter button halfway. In this state, the motor
will not operate even if the camera is ON. Therefore, users must be
aware of the following points.
Manual focus adjustments are not possible.
During zooming, delayed focus will occur.
3. During initial reset
When the camera is ON or when the camera is turned ON by
pressing the shutter button halfway down when the camera is OFF
due to the use of the auto power off function*
1
, the lens performs an
initial reset of the focus lens.
Although the image in the viewfinder will appear out of focus
during the initial reset, this does not mean that the lens has
malfunctioned.
Although the shutter can be released during the initial reset, users
must wait approximately 1 second*
2
after the initial reset has
completed before shooting.
*1: Applicable to the following EF-S lens compatible digital SLR cameras:
EOS 7D, EOS 60D, EOS 50D, EOS 40D, EOS 30D, EOS 20D, EOS 20Da,
EOS REBEL T3i/600D, EOS REBEL T2i/550D, EOS REBEL T1i/500D, EOS
REBEL XSi/450D, EOS REBEL T3/1100D, EOS REBEL XS/1000D, EOS
DIGITAL REBEL XTi/400D DIGITAL, EOS DIGITAL REBEL XT/350D DIGITAL,
EOS DIGITAL REBEL/300D DIGITAL
*2: The initial reset time varies depending on camera being used.
Handling precautions: EF-S18-135mm f/3.5-5.6 IS STM
COP
Y