Canon RF 28-70mm F2 L USM User manual

Instructions
ENG

ENG-1
Thank you for purchasing a Canon product.
Canon RF28-70mm F2 L USM is a large
aperture standard zoom lens for use with
EOS R series cameras.
z“USM” stands for Ultrasonic Motor.
Camera Firmware
Please use the latest version of firmware with the
camera in use. For details on whether the firmware is
the latest version or not, and for details on updating
the firmware, please check the Canon website.
Conventions used in these instructions
Warning to prevent lens or camera malfunction
or damage.
Supplementary notes on using the lens and
taking pictures.

ENG-2
Precautions to ensure that the camera is used
safely. Read these precautions thoroughly. Make
sure all details are observed in order to prevent
risks and injury to the user and other people.
Warning Details pertaining to risks that may
result in death or serious injury.
zDo not look directly at the sun or other strong
light sources through a lens. This may result in
loss of sight.
zDo not leave a lens in the sun without the lens
cap attached. The lens may concentrate entering
sunlight and cause a malfunction or fire.
Caution Details pertaining to risks that may
result in injury.
zDo not leave the product in places exposed to
extremely high or low temperatures. The product
may cause burns or injury when touched.
zDo not insert your hand or fingers into the
product. This may result in injury.
Caution Details pertaining to risks that may result in
damage to property.
zDo not leave the product in excessive heat such as
in a car in direct sunlight. High temperatures can
cause the product to malfunction.
Safety Precautions

ENG-3
Handling Precautions
zIf the lens is taken from a cold environment into a
warm one, condensation may develop on the lens
surface and internal parts. To prevent condensation
in this case, first put the lens into an airtight
plastic bag before taking it from a cold to warm
environment. Then take out the lens after it has
warmed gradually. Do the same when taking the
lens from a warm environment into a cold one.
zPlease also read any lens related handling
precautions listed in your camera’s instruction
manual.
General Precautions

ENG-4
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 equipment.
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 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 connected.
• Consult the dealer or an experienced radio/TV technician
for help.
CAN ICES-3 (B) / NMB-3 (B)

ENG-5
Filter mounting
thread (→ 11)
Control ring (→ 9)
Focusing ring (→ 7)
Rubber ring (→ 6)
Hood mount (→ 10)
Lens mount index (→ 6)
Focus mode switch (→ 7)
Zoom ring (→ 7)
Zoom position index
(→ 7)
Contacts (→ 6)
Lens mount (→ 6)
Zoom ring lock
lever (→ 8)
z For detailed information, reference page numbers are provided in parentheses (→ **).
Nomenclature

ENG-6
Lens mount index
Lens release button Dust cap
Attaching the Lens
Align the lens mount indexes of the lens and
camera, and turn the lens clockwise until you
hear a click.
Detaching the Lens
Turn the lens counterclockwise while pressing
the camera’s lens release button. Detach the
lens once it has stopped turning.
Please refer to the camera's instructions for
details.
zSet the camera’s power switch to OFF when
attaching or detaching the lens.
zAttach the lens cap before detaching the lens
from the camera.
zAfter detaching the lens, place the lens with the
rear end up and attach the dust cap to prevent
the lens surface and contacts from getting
scratched. Make sure the lens and dust cap
mount indexes are aligned when attaching the
dust cap.
zContacts that are scratched, soiled, or have
fingerprints on them may result in faulty
connections or corrosion, which may lead to
malfunctions. If the contacts get soiled, clean
them with a soft cloth.
zThe lens mount has a rubber ring to improve
dust-resistance and water-resistance
performance. This rubber ring may cause
friction marks to appear around the camera’s
lens mount, although this will have no effect on
usage.
zRubber rings can be replaced at Canon Service
Center. (chargeable)
1. Attaching and Detaching the Lens

ENG-7
Focus mode switch
Focusing ring
To shoot in autofocus (AF) mode, set the focus
mode switch to AF.
To use only manual focusing (MF), set the focus
mode switch to MF, and focus by turning the
focusing ring.
zQuickly turning the focusing ring may result in
delayed focus.
zThe lens’ focusing ring is electronic.
zWhen AF operation is set to [ONE SHOT],
manual focus is possible after autofocusing
has been completed by continuing to press the
shutter button halfway. (Full-time manual focus)
However, the camera settings need to be changed.
2. Setting the Focus Mode 3. Zooming
To zoom, turn the lens' zoom ring.
zBe sure to finish zooming before focusing.
Zooming after focusing can affect the focus.

ENG-8
4. Fixing the Zoom Ring
The zoom ring can be fixed to keep the lens at the shortest point. This function is convenient for
carrying a camera on a strap because it prevents the lens from extending.
2Slide the zoom ring lock
lever in the direction
indicated by the arrow.
zTo release the zoom ring, slide
the zoom ring lock lever in the
direction opposite to the arrow.
1Turn the zoom ring
to the widest position
(28mm).
zThe zoom ring cannot be fixed in place at any position other than
the widest position.

ENG-9
The control ring can be assigned the functions
that are commonly used with cameras, such as
shutter speed and aperture settings.
Control ring
The click action of the control ring allows you to
have a sense of how much it is being turned.
Please refer to the camera's instructions for
details on how to use the control ring.
zThere are cases in which the sound of control
ring operations may be recorded when shooting
movies.
zThe clicking sensation of the control ring can
be removed by the Canon Service Center.
(chargeable)
5. Control Ring