Canon RF 28mm F2.8 STM Instructions

RF 28mm F2.8 STM
Instructions

Thank you for purchasing a Canon product.

Canon RF28mm F2.8 STM is a wide lens for use with EOS R series cameras.

• “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.

•  Magnified view functionality is not available.
• In some cases, the camera malfunction may occur.
• Applies to the following camera models:

Safety Precautions

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.

• Do not look directly at the sun or other strong light sources through a lens. This may result in loss of sight.
• Do 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.

• Do not leave the product in places exposed to extremely high or low temperatures. The product may cause burns or injury when touched.

General Precautions

Handling Precautions

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

Shooting Precautions
When the camera recovers from the auto power off status to the shooting-ready status, the front end of the lens moves in both AF/MF mode and an initial reset is performed on the focus lens.

• Do not shoot until the initial reset is completed.
• Focus again after recovering from the auto power off status.
• To maintain the focus position in the shooting-ready status, set [Auto power off] to [Disable] on the camera.

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.

Nomenclature

Attaching and Detaching the Lens

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.

• Set the camera’s power switch to OFF when attaching or detaching the lens.

• Attach the lens cap before detaching the lens from the camera.

• When the power switch of the camera is set to OFF, the focus lens pushed forward is automatically stored.* Do not detach the lens until the lens is completely stored.

• After 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.

• Contacts 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.

• When the lens storage is set to ON on the camera

Focusing/Control ring

The focusing/control ring can be used as either a focusing ring or a control ring.

Use as a Focusing Ring
Set the focus mode/control selector switch to AF or MF.
To shoot in autofocus (AF) mode, set the focus mode/control selector switch to AF. Table1 To use only manual focusing (MF), set the focus mode/control selector switch to MF, and focus by turning the focusing ring (focusing/control ring). Table2
Table: List of Focus Mode and Focusing/Control Ring Functions Using the Focus Mode/ Control Selector Switch

| Focus mode/
Control selector switch
---|---
1 AF| 3 CONTROL| 2 MF
Focus mode| AF| 4 AF/ *5 MF| MF
Focusing/control ring functions| Focusing ring| Control ring| Focusing ring

Use as a Control Ring
Set the focus mode/control selector switch to CONTROL. Table*3
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.

Focusing/Control ring

• Delayed focus may occur if the focusing ring (focusing/control ring) is quickly turned.

• Due to the structural characteristics, the focus lens driving speed may vary according to the variation in the air temperature and posture.

• Do not touch the operating part in the front of the lens while the focus lens is operating. If external pressure is applied to the moving part, the lens initialization may be performed to return the focus lens to the correct position for control purposes.

• Setting the focus mode/control selector switch to CONTROL will fix the focus mode as AF. Table4 However, depending on the camera used, it is possible to switch the focus mode to MF on the camera. Table5
  Please refer to the camera’s instructions for details.

• The lens’ focusing ring (focusing/control ring) is electronic.

• It is possible to set cameras that support electronic fulltime manual focusing to manual focusing when the camera is in the operational mode. However, the camera settings need to be changed.

• When 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, the camera settings need to be changed.

• When movie recording, the AF speed will be slower than the still photo shooting mode. It is possible to adjust the AF speed on the camera by setting Movie Servo AF to [Enable]. Please refer to the camera’s instructions for details.

Hood (Sold separately)

The custom lens hood reduces unwanted light and protects the front of the lens.

Attach the hood correctly and firmly to the hood mounting thread on the front of the lens.

• If the hood is not attached properly, vignetting (darkening of the perimeter of the picture) may occur.
•  Turn OFF the power of the camera before attaching or detaching the hood.

Filters (Sold separately)

You can attach filters (φ55) to the filter mounting thread on the front of the lens. When the hood and filter are used together, attach the hood first, and then attach the filter to the filter mounting thread on the front of the hood.

• Only one filter may be attached.
• Turn OFF the power of the camera before attaching or detaching a filter.
• When the hood and filter are used together, the hood will cause vignetting to occur if the filter is attached to the front of the lens first.

Specifications

retracted)
Weight| Approx. 120 g/4.23 oz.
Hood| EW-55 (Sold separately)
Lens Cap| 0.00E+00
Case| LP811 (Sold separately)

• The lens length is measured from the lens mount surface to the front end of the lens.
  Add 24mm/0.94 in. when including the lens cap and dust cap.

• The maximum diameter, length and weight listed are for the lens itself only.

• You cannot use extenders.

• Close-up Lens 250D/500D cannot be attached because there is no size that fits the lens.

• Multiple exposure shooting is not possible when using this lens on certain cameras*.

• EOS R, RP, Ra, R5, R6

  • All data listed is measured according to Canon standards.
  • Product specifications and appearance are subject to change without notice.

CT1-D291-A
0323Ni
© CANON INC. 2023

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