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Canon EF135mm F2L USM Instruction page 11

Ef lens built-in ultrasonic motors
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This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference,
and (2) this device must accept any interference
received, including interference that may cause
undesired operation.
Do not make any changes or modifications to the
equipment unless otherwise specified in the
instructions. If such changes or modifications should be
made, you could be required to stop operation of the
equipmet.
This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful
interference in a residential installation. This
equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in
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accordance with the instructions, may cause harmful
interference to radio communications. However, there
is no guarantee that interference will not occur in a
particular installation. If this equipment does cause
harmful interference to radio or television reception,
which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the
interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and
receiver.
• Connect the equipment into an outlet on a circuit
different from that to which the receiver is conected.
• Consult the dealer or an experienced radio/ TV
technician for help.
* The lens length is measured from
the front end to the mounting end.
With the front and rear lens caps
attached, add 21.5 mm.
* The dimensions and weight
exclude any attachments.
* Specifications are subject to
change without notice.
"This digital apparatus does not
exceed the Class B limits for radio
noise emissions from digital
apparatus as set out in the
interference-causing equipment
standard
entitled
"Digital
Apparatus", ICES-003 of the
Industry Canada."
N118
ENG-10

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