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Canon RF50mm F1.8 STM Lens, Fixed Focal Length Prime Lens vs Sony SEL90M28G FE

Updated July 2026 — Sony SEL90M28G FE leads on price and weight.

The Canon RF50mm F1.8 STM Lens offers excellent value and versatility for everyday photography, while the Sony SEL90M28G excels in macro capabilities but comes at a higher price. Choose based on your specific needs.

Why Canon RF50mm F1.8 STM Lens, Fixed Focal Length Prime Lens is better

Price

Canon is significantly cheaper at $219.

Weight

Canon is lighter, making it more portable.

Versatility

Canon is suitable for a wider range of photography styles.

Why Sony SEL90M28G FE is better

Macro Performance

Sony offers 1.0x magnification for close-up shots.

Optical Quality

Sony features advanced optics for superior image quality.

Image Stabilization

Sony has built-in Optical Steady Shot for sharper images.

Overall score

Canon RF50mm F1.8 STM Lens, Fixed Focal Length Prime Lens
75
Sony SEL90M28G FE
88

Specifications

SpecCanon RF50mm F1.8 STM Lens, Fixed Focal Length Prime LensSony SEL90M28G FE
AutofocusStepping MotorDirect Drive SSM
CoatingStandard CoatingsNano AR Coating
BokehCircular Aperture9-blade Circular
CompatibilityEOS R SeriesFull-frame E-mount
Weather ResistanceNoYes

Dimension comparison

Canon RF50mm F1.8 STM Lens, Fixed Focal Length Prime LensSony SEL90M28G FE

Overview of the Canon RF50mm F1.8 STM Lens

The Canon RF50mm F1.8 STM Lens is priced at $219.00, making it a budget-friendly option for EOS R series camera users. This compact lens is designed specifically for mirrorless cameras, offering excellent versatility for various photography styles, from portraits to landscapes. With a large f/1.8 aperture, it allows for impressive low-light performance and creative background blur, enhancing the overall quality of images.

The lens features a Stepping Motor (Gear-Type STM) that ensures smooth and quiet autofocus, which is particularly useful during video recording. Additionally, its optimized lens placement and coatings help to minimize ghosting and flare, providing outstanding color balance. The Canon RF50mm is an excellent choice for photographers looking for a lightweight and portable lens that delivers high-quality results.

Overview of the Sony SEL90M28G FE 90mm f/2.8-22 Macro Lens

The Sony SEL90M28G FE 90mm f/2.8-22 Macro G OSS lens is significantly more expensive, priced at $1,048.00. This lens is designed for full-frame E-mount cameras and is recognized for its exceptional macro capabilities, allowing for a maximum magnification ratio of 1.0x. Its bright f/2.8 maximum aperture offers solid low-light performance as well, although it is less wide than that of the Canon RF50mm lens.

One of the standout features of the Sony lens is its Optical Steady Shot image stabilization, which aids in capturing sharp images, especially at close distances. Additionally, it incorporates advanced optics, including Nano AR coating and Super ED glass, to reduce flare and ghosting while enhancing image quality. This lens is ideal for photographers focused on macro photography and those who require greater versatility in their shooting range.

Design and Build Quality

The Canon RF50mm F1.8 STM Lens is compact and lightweight, making it easy to carry around for extended periods. Its design is straightforward, with a control ring for direct setting changes that enhance user experience. The lens is compatible with a range of EOS R series cameras, ensuring that it fits seamlessly into the Canon ecosystem.

In contrast, the Sony SEL90M28G features a dust and moisture-resistant design, which makes it more suitable for challenging outdoor conditions. Weighing in at 602 grams (21.3 oz), it is heavier than the Canon lens but is still manageable for everyday use. The more complex build of the Sony lens reflects its advanced functionality, particularly for macro photography, where detailed and sharp images are critical.

Optical Performance

When it comes to optical performance, the Canon RF50mm F1.8 STM excels with its large f/1.8 aperture, which allows for excellent low-light capabilities and beautiful background blur. It utilizes a PMo aspherical lens to suppress aberrations and features coatings to minimize ghosting and flare, ensuring high-quality images across various lighting conditions.

The Sony SEL90M28G is also equipped with advanced optical technologies, including a floating focus mechanism that ensures sharpness at all focusing distances. Its 9-blade circular aperture contributes to gorgeous bokeh, making it a favorite among macro photographers. With corner-to-corner sharpness, this lens is tailored for capturing intricate details, particularly in close-up shots.

Autofocus Capabilities

The autofocus system in the Canon RF50mm F1.8 STM is driven by a Stepping Motor that provides smooth and quiet operation, a feature that benefits both photography and videography. This capability allows for quick adjustments without distracting noise, making it perfect for capturing candid moments or shooting video.

On the other hand, the Sony SEL90M28G utilizes Direct Drive SSM (DDSSM) for its autofocus system, which ensures quiet and precise focusing. The instant manual/auto focus selection via a sliding focus ring adds to its versatility, allowing photographers to switch quickly between modes. This feature is particularly useful in macro photography, where focus accuracy is paramount.

Price Comparison

The Canon RF50mm F1.8 STM Lens is priced at $219.00, making it about 79% cheaper than the Sony SEL90M28G, which comes in at $1,048.00. For those on a budget or looking for a versatile lens for everyday photography, the Canon option provides excellent value without compromising on quality.

In contrast, the Sony lens, while significantly more expensive, offers advanced features and capabilities tailored to specialized photography needs. Photographers who require exceptional macro performance may find the investment worthwhile, but casual users may prefer the more economical Canon lens for general use.

Intended Use Cases

The Canon RF50mm F1.8 STM Lens is ideal for users who want a versatile lens suitable for a variety of photography styles, including portraits, street photography, and landscapes. Its compact size and lightweight design make it an excellent choice for travel and everyday shooting.

Conversely, the Sony SEL90M28G is tailored for macro photography enthusiasts and professionals who require high-quality close-up shots. Its advanced build and features cater to those focusing on detail-oriented work, making it perfect for nature photography, product shots, and artistic compositions where precision is key.

Which should you buy?

Choosing between the Canon RF50mm F1.8 STM Lens and the Sony SEL90M28G FE 90mm f/2.8-22 Macro G OSS lens ultimately depends on your specific photography needs and budget. If you're looking for a budget-friendly, versatile lens for everyday photography, the Canon RF50mm offers excellent performance at a fraction of the price of the Sony lens.

However, if macro photography is your focus and you're willing to invest in advanced features and superior optical performance, the Sony lens justifies its higher price tag with exceptional capabilities. Consider what you primarily shoot and how much you're willing to spend, and you'll find the lens that best fits your photographic journey.