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

The Canon RF S 18-45mm F4.5-6.3 IS STM lens is a small and flexible lens developed for use with Canon’s full-frame mirrorless RF mount cameras. It has an aperture range of 4.5 to 6.3. It offers a versatile shooting experience, which makes it perfect for a number of photographic genres, including landscape, portrait, and street photography, thanks to its broad focal length range of 18-45mm.

This lens has a sophisticated autofocus mechanism, integrated image stabilization, and high-grade build quality, all of which contribute to its exceptional performance. The Canon RF S 18-45mm F4.5-6.3 IS STM lens is an outstanding pick that gives impressive image quality and an incredible shooting experience. This lens is suitable for both professional photographers and photography enthusiasts.

Key Specs

  • Focal Length: 18-45mm
  • Maximum Aperture: f/4.5 – f/6.3
  • Lens Mount Type: RF Mount
  • Compatible Cameras: Canon EOS R-series, APS-C, and full-frame (automatic APS-C sensor cropping if used on full-frame EOS R-series cameras)
  • Minimum Focusing Distance: 0.20m (at 18mm)
  • Maximum Magnification: 0.16x (at 45mm)
  • Field of View, at Minimum Focus Distance: Approximately 153 x 102mm (at 18mm) to approximately 137 x 92mm (at 45mm)
  • Angle of View (Diagonal): Approximately 74° 20′ – 33° 40′


In terms of performance, the Canon RF S 18-45mm F4.5-6.3 IS STM lens shines, since it is capable of producing photos that are both crisp and detailed across the entirety of its focal length range. The autofocus technology of the lens is called STM (Stepping Motor), and it allows for focusing that is quick, accurate, and nearly silent.

Because of these characteristics, the lens is perfect for both still photography and video recording. Even in difficult lighting situations or while capturing moving subjects, the autofocus technology enables speedy subject acquisition and precise tracking so the photographer can get the best possible shot.

Autofocus System

One of the most notable features of the Canon RF S 18-45mm F4.5-6.3 IS STM lens is its internal focusing motor, which not only improves its overall performance but also makes it more convenient to use. The Stepping Motor (STM) technology offers a smooth and almost completely quiet focusing operation, which is particularly useful for videography.

Your subjects will always seem crisp and in focus thanks to the autofocus technology, which focuses quickly and precisely regardless of whether you are taking still photos or filming films. You are also able to make fine changes manually, even when the autofocus is active, thanks to the lens’s full-time manual focus override feature, which is included as standard. The autofocus technology of the Canon RF S 18-45mm F4.5-6.3 IS STM lens, in general, contributes to the lens’ increased adaptability and utility in a wide variety of shooting scenarios.

Vibration Reduction

The image stabilization that is included into the Canon RF S 18-45mm F4.5-6.3 IS STM lens is especially helpful for hand-held photography in low-light circumstances or when utilizing slower shutter speeds. You’ll be able to take clear photographs that are free from blur thanks to the optical image stabilization technology that successfully counteracts the effects of camera shaking.

When shooting at the telephoto end of the lens’s focal length range, which is where the effects of camera shake are most evident, this function is extremely useful. You will be able to comfortably photograph in a broad variety of lighting circumstances without the need for a tripod if your camera has an image stabilization feature. This will allow you to increase the creative options available to you and ensure that the images are consistently crisp.

Build Quality

The Canon RF S 18-45mm F4.5-6.3 IS STM lens features a sturdy build quality that is built to survive the demands of professional usage while yet retaining a lightweight and compact form factor. This lens was intended to withstand the rigors of professional use. The lens barrel is made from high-quality components that provide durability as well as resistance to dust and moisture, which ensures its dependability even when used in demanding shooting settings.

The lens has a metal mount that can be attached firmly to the body of the camera, which provides the user with stability and precision when they are using the lens. In spite of its sturdy construction, the lens has managed to keep its low weight and portability, making it a fantastic choice for photographers who place equal importance on functionality and portability.

Handling and Ergonomics

The ergonomics of the Canon RF S 18-45mm F4.5-6.3 IS STM lens were taken into consideration throughout its design, resulting in a lens that is easy to handle even during lengthy shooting sessions. You can modify the focal length thanks to the lens’s streamlined and snappy zoom ring, which is included in its design.

The location of the zoom ring allows for simple access, which enables rapid adjustments to be made to the framing while still retaining a firm grasp on the lens. In addition to that, the lens has what’s known as a dedicated focus ring, which allows for accurate manual adjustment of the focus whenever it’s needed. Because of the lens’s ergonomic and user-friendly construction, photographers are free to concentrate uninhibitedly on realizing the creative potential of their subject matter.

Image Stabilization

The Canon RF S 18-45mm F4.5-6.3 IS STM lens has a built-in image stabilization technology, which is a vital feature that helps to eliminate the effects of camera shake and create clear, blur-free photographs. Optical stabilization detects and counteracts even the most minute motions of the camera, enabling you to make use of slower shutter speeds without the image becoming blurry as a result of the photographer’s hands shaking.

This function comes in especially handy when shooting in low-light conditions or at telephoto lens lengths, both of which increase the likelihood that the camera may shake during the shot. You will be able to securely shoot handheld thanks to image stabilization, which will liberate you from the restrictions of using a tripod and open up more opportunities for creative expression.

Shooting Experience

Because of its adaptable focal length range as well as its other cutting-edge characteristics, the Canon RF S 18-45mm F4.5-6.3 IS STM lens makes taking photographs a pleasurable experience. The lens has an extensive range of focal lengths, beginning at a reasonably wide 18mm and extending all the way to 45mm. Because of this, it is perfect for photographing expansive landscapes or large groups of people, and it also enables you to produce beautiful background blur in portrait photography by isolating subjects from their backgrounds.

Because the focusing function of the lens is both quick and precise, you will never miss an important moment again. You will be able to produce focus changes that are smooth and seem very professional thanks to the autofocus motor’s very quiet operation, which makes it an excellent choice for use when capturing video. The Canon RF S 18-45mm F4.5-6.3 IS STM lens, in general, provides a smooth shooting experience, combining great performance with an intuitive design that makes it simple to operate.

Image Quality

Impressive picture quality is provided by the Canon RF S 18-45mm F4.5-6.3 IS STM lens, which is capable of shooting images that are crisp and detailed and have outstanding color reproduction. The lens employs a mix of high-quality optics and modern lens coatings to minimize aberrations and distortions. As a consequence, the pictures produced by the lens have excellent clarity and contrast. The sharpness of the lens is maintained across the frame regardless of the aperture size used, which ensures that image quality is maintained over the whole focal length range.

You may shoot with the lens wide open at F4.5 or use smaller apertures. Even in adverse lighting circumstances, you’ll be able to take photos with accurate colors and great levels of contrast thanks to the lens’s efficient correction of chromatic aberrations and reduction of lens flare. Overall, the Canon RF S 18-45mm F4.5-6.3 IS STM lens produces superb image quality that satisfies the requirements posed by amateurs as well as those posed by experts.

Teleconverter Compatibility

Because it is compatible with Canon’s teleconverter choices, the Canon RF S 18-45mm F4.5-6.3 IS STM lens may broaden its focal length range and utilize a wider variety of applications. You may effectively enhance the lens’s reach by installing a teleconverter, which makes the lens excellent for shooting of animals or sports that demand longer focal lengths.

Because the teleconverter does not interfere with the lens’s ability to autofocus, you will still be able to take clear pictures of subjects that are moving quickly. This compatibility further strengthens the adaptability of the Canon RF S 18-45mm F4.5-6.3 IS STM lens, enabling photographers to adapt to a variety of shooting circumstances and obtain the results they are looking for.

Comparison with Competitors

When compared to other lenses in its class, the Canon RF S 18-45mm F4.5-6.3 IS STM stands out because of its compact and lightweight construction, outstanding picture quality, and cutting-edge features. Because its focal length range can accommodate such a broad variety of shooting requirements, it may be used for a wide variety of photographic applications.

The focusing system of the lens is quick and precise, guaranteeing that you will have no trouble capturing the subjects of your photographs, and the image stabilization feature enables you to shoot handheld photographs even while working in difficult lighting circumstances. In addition, the lens’s build quality and its ease of handling make it a trustworthy and pleasant option for usage over an extended period of time. The Canon RF S 18-45mm F4.5-6.3 IS STM lens, in general, provides a compelling mix of performance and value, which positions it as a leading contender in its category.


Focal Length18-45mm
Maximum Aperturef/4.5 – f/32
Lens Mount TypeRF Mount
Compatible CamerasCanon EOS R-series, APS-C and full-frame (automatic APS-C sensor cropping if used on full-frame EOS R-series cameras)
Minimum Focusing Distance0.20 m (at 18 mm)
Maximum Magnification0.16x (at 45 mm)
Field of ViewApprox. 153 x 102 mm (at 18 mm) to approx. 137 x 92 mm (at 45 mm)
Angle of View (Diagonal)Approx. 74° 20′ – 33° 40′

Pros and Cons


  • A range of focal lengths that are versatile and may be used for a variety of types of photography.
  • A lightning-fast and precise focusing mechanism that allows for pinpoint subject tracking.
  • Integrated picture stabilization ensures photographs are captured without any blurring.
  • Quality of construction that is both sturdy and resistant to dirt and dampness.
  • Enjoyable shooting experience thanks to handling that is comfortable and controls that are easy to understand.


  • There is a possibility that low-light performance will suffer due to the telephoto end’s smaller maximum aperture.
  • The zoom range is significantly less than that of other rival lenses.
  • When zooming in and out, if the lens has a variable aperture design, the exposure settings may need to be adjusted.

Price and Availability

The Canon RF S 18-45mm F4.5-6.3 IS STM lens has a price that is comparable to other lenses in its class and provides an outstanding value considering its capabilities and specifications. Photographers who are interested in upgrading their equipment will find that it is readily available through authorized Canon merchants and internet outlets, making it simple to get their hands on.

Both amateurs and professionals looking for a high-quality lens for their Canon RF mount cameras will find the lens’s affordable price point, as well as its broad focal length range and sophisticated functions, to be an appealing alternative.


The Canon RF S 18-45mm F4.5-6.3 IS STM lens is a well-rounded lens that combines exceptional performance, adaptability, and image quality. It has a focal range that ranges from 4.5 to 6.3 millimeters. It gives photographers with the tools they need to take great photographs in a variety of shooting conditions thanks to its extensive focal length range, powerful autofocus technology, and built-in image stabilization.

The lens’s impressive build quality, user-friendly handling, and ability to work with teleconverters all contribute to its widespread popularity. The Canon RF S 18-45mm F4.5-6.3 IS STM lens is a dependable and capable option that will boost your photographic experience no matter what type of photographer or videographer you are. Whether you are interested in landscape photography, portrait photography, or videography.

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

Q. Is the Canon RF S 18-45mm F4.5-6.3 IS STM lens compatible with full-frame Canon EOS R-series cameras?
A. Yes, the lens is compatible with Canon EOS R-series cameras, including full-frame models. However, when used on full-frame cameras, there is automatic APS-C sensor cropping applied.
Q. What is the minimum focusing distance of the Canon RF S 18-45mm F4.5-6.3 IS STM lens?
A. The lens has a minimum focusing distance of 0.20m (at 18mm), allowing you to get close to your subject for detailed shots.
Q. Does the Canon RF S 18-45mm F4.5-6.3 IS STM lens have image stabilization?
A. Yes, the lens features built-in image stabilization, which helps to minimize camera shake and produce sharper images, particularly in low-light situations or when shooting at longer focal lengths.
Q. What is the maximum aperture of the Canon RF S 18-45mm F4.5-6.3 IS STM lens?
A. The lens has a variable maximum aperture range of f/4.5 to f/6.3, depending on the focal length you are using. This aperture range provides flexibility in different lighting conditions.
Q. Can I use teleconverters with the Canon RF S 18-45mm F4.5-6.3 IS STM lens?
A. Yes, the lens is compatible with Canon teleconverters, allowing you to extend the focal length range and capture subjects at greater distances. This feature enhances the lens’s versatility for wildlife or sports photography.



Peter is an accomplished and passionate photographer whose captivating images have garnered global recognition. With a remarkable ability to capture fleeting moments and convey profound emotions, his work transcends boundaries and tells compelling visual stories. From stunning landscapes to intimate portraits, Peter's expertise in various genres of photography showcases his artistic vision and technical mastery.