Canon RF-S 18-45mm F4.5-6.3 IS STM User manual

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Instructions

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Thank you for purchasing a Canon product.
Canon RF-S18-45mm F4.5-6.3 IS STM is a
standard zoom lens for use with EOS R series
cameras* compatible with RF-S lenses.
* Images that have been cropped from the center
of the image screen will be taken when mounted
on EOS R series cameras with full-size sensors.
(Equivalent to the APS-C size)
Please refer to the camera’s instructions for details.
z“IS” stands for Image Stabilizer.
z“STM” stands for Stepping Motor.
Conventions used in these instructions
Warning to prevent lens or camera malfunction
or damage.
Supplementary notes on using the lens and
taking pictures.
Camera Firmware and
Camera Applications
Please use the latest versions of firmware and
applications with the camera in use. For details on
whether the firmware and applications in use are the
latest version or not, and for details on updating them,
please check the Canon website.
If the camera’s* firmware is not a compatible
version, the following limitations will apply.
zMagnified view functionality is not available.
zIn some cases, the camera malfunction may
occur.
* Applies to the following camera models:
EOS R and EOS RP

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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 or damage to other
objects.
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.
Safety Precautions

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Handling Precautions
zDo not leave the product in excessive heat such as
in a car in direct sunlight. High temperatures can
cause the product to malfunction.
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.
zIn order to optimize aperture control, there are
occasions in which the aperture blades will move
during zooming, even when the aperture value is
set for aperture-priority AE or manual exposure,
etc.
zPlease also read any lens related handling
precautions listed in your camera’s instruction
manual.
General Precautions

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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 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)

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Zoom position index (→ 13)
Lens retracted position index (→ 7)
Hood mount (→ 15)
Filter mounting thread
(→ 16)
Zoom ring (→ 13)
Lens mount index (→ 6)
Focusing/control ring (→ 8)
Contacts (→ 6)
Lens mount (→ 6)
z For detailed information, reference page numbers are provided in parentheses (→ **).
Nomenclature

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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.
1. Attaching and Detaching the Lens

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The lens is fitted with a retraction mechanism.
This enables the length of the lens to be shortened in comparison to when shooting.
Shooting is not possible when the lens is stored.
Observe the following procedure to set the lens in the position for shooting.
Retracting Lens
1Rotate the zoom ring from the shooting
position in the opposite direction to the
white arrow.
2Continue rotating after it exceeds the
wide-angle position (18mm).
3Rotate it to the end to align the lens
retraction position indicator with the
zoom indicator and store it.
zTake care to avoid catching your fingers, etc.,
between the lens extender and Focusing/Control
ring.
2. Shooting Preparations and Retracting Lens
Preparations from Retraction to Shooting
Rotate the zoom ring in the direction of the white
arrow until you hear a click to set the lens in the
preparatory shooting position.
zIf the lens retraction position indicator is aligned
with the zoom indicator, add slight pressure to
rotate the zoom ring in the direction of the arrow.

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3. Focusing/Control ring
The focusing/control ring can be used as either a
focusing ring or a control ring.
Focusing/control ring
Switching between the focusing ring and control
ring is performed on the camera.
This can only be used as a focusing ring on
cameras that do not support switching*.
Please refer to the camera's instructions for
details.
* EOS R, RP, Ra, R5, R6
Use as a Focusing Ring
Set the focus mode (AF/MF) on the camera.
To shoot in autofocus (AF) mode, set the
camera’s focus mode to AF.
To use only manual focusing (MF), set the
camera’s focus mode to MF, and focus by turning
the focusing ring (focusing/control ring).
zWhen the AF does not operate after switching the
focus mode from [MF] to [AF] and when the focus
mode is not displayed on the camera’s menu, turn
the focus ring in the direction of [Infinity] until the
focusing position is within the [AF in-focus range].
• It is not possible to switch the focus mode to [AF]
if the focus lens’s focusing position is within the
[MF-only range], at which the focus can only be
aligned in the MF mode.
• Refer to 4. Taking Closeup Shots in the Manual
Focusing (MF) Mode for further details.

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Use as a Control Ring
Set the control ring function using the camera’s
menu. The control ring can be assigned the
functions that are commonly used with cameras,
such as shutter speed and aperture settings.
Please refer to the camera’s instructions for
details on how to use the control ring.
zThe lens does not have a focus mode switch or
a focusing/control selector switch.
zDelayed focus may occur if the focusing ring
(focusing/control ring) is quickly turned.
zThe lens’ focusing ring (focusing/control ring) is
electronic.
zWith a camera capable of electronic full-time
manual focus, manual focusing is possible
in both One-Shot AF and Servo AF modes.
However, this requires a change in camera
settings.
zWhen AF operation is set to One-Shot AF,
manual focus is possible after autofocusing
has been completed by continuing to press the
shutter button halfway (electronic manual focus
function). However, this requires a change in
camera settings.
Please refer to the camera’s instructions for
details.
Focusing/control ring

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Shots taken with the camera’s manual focusing
(MF) mode when using this lens make the
subject seem closer and larger than with the
autofocus (AF) mode.
The focusing distance ranges of the wide end
are shown below.
• AF in-focus range : 0.2 m/0.66 ft. to ∞
• MF in-focus range : 0.15 m/0.49 ft. to ∞
Focusing within a range of 0.15 m/0.49 ft. to less
than 0.2 m/0.66 ft. is possible only when using the
MF mode. (MF-only range)
zThe [AF in-focus range] and [MF in-focus range]
will differ in accordance with the focal length.
z Refer to the specifications on page 17 for details
on the range of focusing distances apart from
with wide-angle lenses.
zThe focusing distance represents the distance
between the [ ] mark (focal plane mark) on the
camera and the subject.
4. Taking Closeup Shots in the Manual Focusing (MF) Mode
Wide-end Examples:
AF
MF
Focal planeSubject
0.2 m/0.66 ft.
AF
0.15 m/
0.49 ft.
MF

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Taking Closeup Shots in the Manual Focusing (MF) Mode
Take the following steps for shooting in the [MF-only range].
1Set the focusing/control ring on the camera to the focusing ring.
2Set the focusing mode on the camera to [MF].
3Turn the focusing ring in the short-range direction to move the focusing position from [AF in-focus
range] to [MF-only range]. (*Notes 1 & 2)
4Manually focus on the subject while in the [MF-only range] and take the picture.
Note 1: It is possible to move the focus to the [MF-only range] with the use of the lens’s electronic manual focusing
function*1 or the electronic full-time manual focusing function*2 with the camera’s focus mode still set at [AF].
The camera focus mode will automatically switch to [MF] when the focusing position enters the [MF-only
range] during this.
Note 2: It is not possible to switch the focus mode to [AF] when the focusing position is in the [MF-only range].
In order to switch to [AF], turn the focusing ring in the direction of [Infinity] until the focusing position enters
the [AF in-focus range].
*1 A function that enables the focus to be adjusted manually if the shutter button continues to be pressed halfway
after performing AF operations when the camera’s AF operation mode is set at One-Shot AF.
*2 A function that enables the focus to be adjusted manually in both the One-Shot AF and Servo AF modes.
However, it is necessary to amend the camera settings for both functions *1and *2. Please refer to the camera’s
instructions for details.
The following limitations are in effect when the focus point is within the [MF-only range].
zThe image quality will decline compared to the [AF in-focus range]. It is therefore recommended that you
shoot while checking the images after each shot.
zDetection accuracy levels for the focus guide function will be lowered. Use the focus guide function within the
[AF in-focus range].
zIt is not possible to align the focus when taking remote shots with PCs and smartphones.

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Taking Closeup Shots in the Manual Focusing (MF) Mode
It is possible to check the focusing position with the use of the camera’s focusing distance display function*3.
③ ④
②
①
Wide-angle focusing distance display (image)
Telephoto focusing distance display (image)
Camera monitor display (image)
The illustrations on the left above are enlarged images of the camera’s focusing distance display areas*4.
• The short-range direction is on the left, the infinity symbol on the right indicates the infinity direction,
and the numerals on the right-hand side indicate the focal length.
• The orange vertical line shown in (1) indicates the current focusing position.
• The range of the white line shown in (2) indicates the range of focusing positions that can be used for shooting.
• The range shown in (3) is the [MF-only range] within which the focus can be aligned only when in the [MF] mode.
• The range shown in (4) is the range within which the focus can be aligned when in both the [MF] and
[AF] modes. The focus can only be aligned within the range shown in (4) when in the [AF] mode.
*3 Refer to the camera’s instruction manual for details on displaying the [Focusing Distance Display].
*4 The [AF in-focus range] and [MF in-focus range] will differ in accordance with the focal length, which means that
the focusing distance display will vary with the focal length.

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Zoom ring
To zoom, turn the lens’ zoom ring.
zBe sure to finish zooming before focusing.
Zooming after focusing can affect the focus.
zBlurring may temporarily occur if the zoom ring is
quickly turned.
5. Zooming
This function provides image stabilization
appropriate for shooting conditions (such as
shooting still subjects and panning shots).
The Image Stabilizer is turned ON and OFF with
the camera settings. Please refer to the camera’s
instructions for details.
zThe Image Stabilizer cannot compensate for a
blurred shot caused by a subject that moved.
zThe Image Stabilizer may not be fully effective if
you shoot from a violently shaking vehicle or other
transportation.
zWhen using a tripod, it is recommended that the
image stabilizer is set at OFF.
zEven with a monopod, the Image Stabilizer will
be as effective as during hand-held shooting.
However, depending on the shooting conditions,
there are cases in which the Image Stabilizer
effect may be less effective.
zThe Image Stabilizer will work in combination with
cameras with in-body Image Stabilizer.
6. Image Stabilizer

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The Image Stabilizer for this lens is suited to hand-held shots in the following conditions.
Image Stabilizer
zIn semi-darkened areas such as indoors or
outdoors at night.
zIn locations where the flash cannot be used,
such as art museums and theater stages.
zIn situations where your footing is uncertain.
zIn situations where fast shutter speed settings
cannot be used.
zPanning shots of vehicles, trains, etc.
It compensates for vertical camera shake during panning shots in a
horizontal direction, and compensates for horizontal camera shake
during panning shots in a vertical direction.

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The custom lens hood reduces unwanted light that causes flare and ghosting and protects the front
of the lens from rain, snow, and dust.
7. Hood (Sold separately)
Attachment position mark
Stop position markAttachment position mark
Red dot
Red dot
Red dot
Attaching the Hood
Align the red attachment position mark on the
hood with the red dot on the front of the lens,
and then turn the hood in the direction of the
arrow until the red dot on the lens is aligned with
the stop position mark on the hood and the hood
is firmly attached.
Detaching the Hood
Rotate the hood in the direction of the arrow until
the hood attachment position mark is aligned
with the red indicator on the front of the lens to
remove it.
The hood can be reverse-mounted on the lens
for storage.
zIf the hood is not attached properly, vignetting (darkening of the perimeter of the picture) may occur.
zGrasp and turn the base of the hood when attaching and detaching it. There are cases in which it may
become deformed if the hood is turned with it grasped near to the rim.

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8. Filters (Sold separately)
You can attach filters to the filter mounting thread
on the front of the lens.
zOnly one filter may be attached.

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Specifications
Focal Length/Aperture
18-45mm f/4.5-6.3
Lens Construction 7 groups, 7 elements
Maximum Aperture f/4.5-6.3 (1/3 stops), f/4.5-6.7 (1/2 stops)
Minimum Aperture f/22-32
Angle of View Horizontal: 64°30' - 28°20', Vertical: 45°30' - 19°00',
Diagonal: 74°20' - 33°40'
AF Mode
Focal Length
18 mm 24 mm 28 mm 35 mm 45 mm
Min. Focusing Distance
0.2 m/0.66 ft. 0.23 m/0.75 ft. 0.26 m/0.85 ft. 0.3 m/0.94 ft. 0.35 m/1.15 ft.
Max. Magnification 0.14x 0.15x 0.15x 0.15x 0.16x
Field of View
Approx. 153 x 102 mm/
Approx. 6.02 x 4.02 in.
Approx. 149 x 100 mm/
Approx. 5.87 x 3.94 in.
Approx. 147 x 98 mm/
Approx. 5.79 x 3.56 in.
Approx. 144 x 96 mm/
Approx. 5.67 x 3.78 in.
Approx. 137 x 92 mm/
Approx. 5.39 x 3.62 in.
MF Mode
Focal Length
18 mm 24 mm 28 mm 35 mm 45 mm
Min. Focusing Distance
0.15 m/0.49 ft. 0.2 m/0.66 ft. 0.23 m/0.75 ft. 0.24 m/0.79 ft. 0.25 m/0.82 ft.
Max. Magnification 0.25x 0.19x 0.18x 0.21x 0.26x
Field of View
Approx. 90 x 60 mm/
Approx. 3.54 x 2.36 in.
Approx. 118 x 79 mm/
Approx. 4.65 x 4.91 in.
Approx. 126 x 84 mm/
Approx. 4.96 x 3.31 in.
Approx. 105 x 70 mm/
Approx. 4.13 x 2.76 in.
Approx. 86 x 57 mm/
Approx. 3.39 x 2.24 in.
Filter Diameter 49 mm
Max. Diameter and Length
Approx. 69 x 44.3 mm/2.72 x 1.74 in. (when lens is retracted)
Weight Approx. 130 g/4.59 oz.
Hood EW-53 (Sold separately)
Lens Cap E-49
Case LP814 (Sold separately)

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z Focal length images will be 29-72 mm when converted to the 35 mm format.
zThe lens length is measured from the lens mount surface to the front end of the lens.
Add 23.9 mm/0.94 in. when including the lens cap and dust cap.
zThe maximum diameter, length and weight listed are for the lens itself only.
zClose-up Lens 250D/500D cannot be attached because there is no size that fits the lens.
zYou cannot use extenders.
zMultiple exposure shooting is not possible when using this lens on certain cameras*.
* EOS R, RP, Ra, R5, R6
zThere are cases in which using the zoom function during continuous shooting may result in
conspicuous image distortion.
zAll data listed is measured according to Canon standards.
zPhotos shown are for illustration purposes only.
zProduct specifications and appearance are subject to change without notice.
Specications

CT1-D207-A 0122Ni © CANON INC. 2022