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Canon RF vs SIGMA 18-

Updated July 2026 — Canon RF wins on diameter and max magnification, SIGMA 18- wins on weight and length.

The Canon RF 85mm F2 Macro is STM excels in portrait and macro photography, while the SIGMA 18-50mm F2.8 offers versatility with its zoom range.

Why Canon RF is better

Image Quality

Canon lens provides superior bokeh and low-light performance.

Macro Capability

Canon lens has a higher maximum magnification.

Stabilization

Canon lens features advanced image stabilization.

Why SIGMA 18- is better

Versatility

SIGMA lens offers a zoom range for various photography styles.

Weight

SIGMA lens is lighter and more compact.

Durability

SIGMA lens has a rubber-sealed mount for better protection.

Overall score

Canon RF
88
SIGMA 18-
82

Specifications

SpecCanon RFSIGMA 18-
Aperturef/2f/2.8
Focal Length85mm18-50mm
StabilizationYesNo
Minimum Focus1.15 ft12.1 cm
ZoomNoYes

Dimension comparison

Canon RFSIGMA 18-

Overview of the Canon RF 85mm F2 Macro is STM

The Canon RF 85mm F2 Macro is STM is a versatile medium-telephoto lens that excels in various photography scenarios. Priced at $589.00, it offers a bright f/2 aperture for beautiful bokeh and impressive low-light performance. This lens is ideal for portrait and macro photography, making it a valuable addition to any Canon mirrorless camera kit.

The lens features a maximum magnification of 0.5x and a minimum focusing distance of 1.15 ft, allowing for stunning close-up shots. Its optical image stabilization system provides up to 5 stops of shake correction, making it perfect for handheld shooting in low light. Additionally, the built-in control ring allows for quick adjustments, enhancing the shooting experience.

Overview of the SIGMA 18-50mm F2.8 DC DN

The SIGMA 18-50mm F2.8 DC DN Contemporary Lens comes in at $599.99, making it slightly more expensive than the Canon RF 85mm lens. However, this lens provides a versatile zoom range, making it suitable for a variety of photography styles, from landscapes to portraits.

Weighing only 300g, this lens is compact and lightweight, making it easy to carry around for extended periods. It also features a rubber-sealed mount for better durability in various environments. With a minimum focusing distance of 12.1cm and a maximum magnification of 1:2.8, it allows users to capture close-up shots with ease.

Image Quality and Performance

When it comes to image quality, the Canon RF 85mm F2 Macro is STM excels in creating striking portraits and detailed macro images thanks to its bright f/2 aperture. This aperture not only contributes to the lens's ability to produce beautiful bokeh but also helps in low-light conditions, making it a strong contender for evening or indoor photography.

On the other hand, the SIGMA 18-50mm F2.8 boasts a constant f/2.8 aperture throughout its zoom range, allowing for consistent exposure settings. While it may not offer the same level of bokeh as the Canon lens, it compensates with its versatility, making it suitable for a broader range of shooting conditions and styles. Photographers looking for flexibility might find the zoom range advantageous for capturing varied subject matter.

Build Quality and Design

The build quality of the Canon RF 85mm F2 Macro is designed for serious photographers, featuring a lightweight yet durable structure that’s easy to handle. Its compact design is enhanced by the control ring, which allows users to quickly adjust settings on the fly. This lens is optimized for Canon's full-frame mirrorless cameras, ensuring a perfect fit and seamless operation.

In contrast, the SIGMA 18-50mm F2.8 is the smallest and lightest in its class, measuring just 69.2mm in diameter and 74.5mm in length. Its rubber-sealed mount adds an element of protection against environmental factors, making it suitable for outdoor use. The compact size and lightweight design make it an attractive option for photographers who prioritize portability without sacrificing performance.

Special Features

The Canon RF 85mm F2 Macro is packed with features that make it stand out, particularly for macro photography. Its maximum magnification of 0.5x and a minimum focusing distance of 1.15 ft allow users to capture intricate details in their subjects. The hybrid image stabilization system is another highlight, providing up to 5 stops of shake correction, which is particularly beneficial for handheld shooting in low-light situations.

The SIGMA 18-50mm F2.8 also comes with impressive features, including a maximum magnification of 1:2.8 and a minimum focusing distance of 12.1cm. This lens allows for easy close-up shots while maintaining high-quality performance. The ability to switch between wide-angle and standard focal lengths offers versatility for various photography styles, making it an excellent choice for those who want an all-in-one lens.

Price Comparison

The Canon RF 85mm F2 Macro is priced at $589.00, while the SIGMA 18-50mm F2.8 is slightly more expensive at $599.99, making the Canon lens about 1.7% cheaper. Given that both lenses offer unique features catering to different photography needs, the price difference may influence a buyer's decision based on their specific requirements.

For photographers focused on portrait and macro work, the value in the Canon RF 85mm lens justifies its price. Conversely, those looking for a more versatile lens may find the SIGMA's capabilities worth the extra cost. It’s essential for potential buyers to consider what type of photography they plan to pursue when evaluating the price points.

Which should you buy?

Choosing between the Canon RF 85mm F2 Macro is STM and the SIGMA 18-50mm F2.8 DC DN ultimately boils down to your photography needs. The Canon lens is ideal for those who prioritize portrait and macro photography, thanks to its bright aperture and stabilization features. Meanwhile, the SIGMA lens offers a versatile zoom range that caters to a broader spectrum of photography styles.

If image quality and macro capabilities are your primary concerns, the Canon RF 85mm F2 Macro’s features may make it the better choice despite its slightly lower price. However, if you prefer a lightweight, compact zoom lens that can adapt to various shooting scenarios, the SIGMA 18-50mm F2.8 might be the way to go. Consider your shooting style and budget to make the most informed decision.