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Canon RF75- vs Sigma 17-

Updated July 2026 — Canon RF75- wins on price and accessories, Sigma 17- wins on weight and aperture.

The Canon RF75-300mm offers great value and portability, while the Sigma 17-40mm excels in low-light performance and image quality.

Why Canon RF75- is better

Price

Canon is significantly cheaper at $239.

Portability

Canon is lightweight and easy to carry.

Accessories

Canon includes a UV filter and cleaning kit.

Why Sigma 17- is better

Aperture

Sigma has a constant F1.8 aperture for low-light.

Optics

Sigma delivers superior image quality.

Build Quality

Sigma is part of the Art series for professional use.

Overall score

Canon RF75-
75
Sigma 17-
88

Specifications

SpecCanon RF75-Sigma 17-
Focal Length75-300mm17-40mm
ApertureF4-5.6F1.8
CompatibilityCanon EOS RSony E-mount
Weight0.75 lbs1.5 lbs
Image QualityGoodExcellent

Dimension comparison

Canon RF75-Sigma 17-

Overview of the Canon RF75-300mm F4-5.6 Zoom Lens

The Canon RF75-300mm F4-5.6 Zoom Lens is a compact and lightweight option designed for Canon EOS R series cameras. Priced at $239.00, it offers a significant range of focal lengths that can enhance the versatility of your photography. This lens is particularly noted for its portability, weighing about the same as a 500ml water bottle, making it easy to carry for outdoor shoots or travel.

Designed with features tailored for modern photography, the RF75-300mm allows for impressive eye detection, even at its maximum zoom. This capability is essential for capturing sharp portraits or detailed wildlife shots. Additionally, this lens comes bundled with useful accessories, including a UV filter, a lens cap keeper, and a cleaning kit, enhancing its value for photographers looking for a complete package.

Overview of the Sigma 17-40mm F1.8 DC

The Sigma 17-40mm F1.8 DC, priced at $919.00, is a premium lens aimed at photographers using Sony E-mount APS-C cameras. It boasts a bright F1.8 constant aperture, making it ideal for low-light situations and for achieving creative depth effects in images. This lens is part of Sigma's Art series, renowned for delivering sharp detail and professional image quality.

The 17-40mm focal range makes it versatile for various genres, including portraits and travel photography. The build quality and optical performance are engineered for those who prioritize detail and clarity, making this lens a strong contender for serious photographers who demand high standards.

Price Comparison

When it comes to pricing, the Canon RF75-300mm is significantly more budget-friendly at $239.00 compared to the Sigma 17-40mm, which costs $919.00. This makes the Canon lens about 74% cheaper than the Sigma lens. For photographers who are just starting out or who are working within a tighter budget, the Canon RF75-300mm offers an attractive price-to-performance ratio.

While the Sigma lens justifies its higher price with superior build quality and optical performance, the Canon lens provides a practical choice without compromising on essential features, making it accessible for a broader audience.

Focal Length and Versatility

The Canon RF75-300mm offers an extensive focal length range from 75mm to 300mm, which is ideal for capturing subjects from a distance, making it perfect for wildlife and sports photography. The versatility in focal lengths allows photographers to experiment with various compositions and perspectives, enhancing creative possibilities.

In contrast, the Sigma 17-40mm has a shorter focal range of 17mm to 40mm, which is more suited for landscapes, street photography, and wider shots. While both lenses cater to different photographic needs, the Canon lens provides greater zoom capabilities. However, the Sigma's wide-angle capabilities and fast aperture make it a strong choice for low-light scenarios and intimate settings.

Build Quality and Accessories

The Canon RF75-300mm is designed for portability, making it an excellent option for photographers who value ease of transport. It comes with a UV filter, lens cap keeper, and a cleaning kit, providing added value right out of the box. These accessories not only enhance the user experience but also ensure that the lens remains protected and maintained.

On the other hand, the Sigma 17-40mm is part of the Art series, suggesting a focus on superior construction and optical performance. While the accompanying accessories are not specified, the lens is designed for serious photographers, indicating that it may be built to withstand rigorous use. The investment in the Sigma lens is justified by its professional-grade optics, ideal for those who require the highest image quality.

Low-Light Performance

For low-light situations, the Sigma 17-40mm F1.8 has a distinct advantage with its constant F1.8 aperture. This feature allows for more light to enter the lens, making it easier to capture sharp images in darker environments without resorting to higher ISO settings. This capability is particularly beneficial for indoor photography or evening events where lighting conditions are less than ideal.

In contrast, the Canon RF75-300mm has a maximum aperture range of F4-5.6, which may limit its performance in low-light situations. While it excels in bright environments or during the day, photographers may find it challenging to achieve the same level of performance in dimly lit settings. Thus, for those who frequently shoot in low light, the Sigma lens may be the more advantageous choice.

Target Audience

The Canon RF75-300mm is geared towards casual photographers and those who enjoy outdoor adventures or events where portability is essential. Its lower price point makes it an appealing choice for hobbyists or individuals looking to expand their lens collection without a hefty investment.

Conversely, the Sigma 17-40mm is targeted at more serious enthusiasts and professionals who prioritize high-quality optics and low-light performance. Its higher price reflects its positioning in the market for photographers who need reliable equipment that can deliver exceptional results across various scenarios, especially in controlled environments.

Which should you buy?

Choosing between the Canon RF75-300mm F4-5.6 Zoom Lens and the Sigma 17-40mm F1.8 DC ultimately depends on your specific photography needs and budget. If you are looking for an affordable, lightweight option that offers excellent zoom capabilities for outdoor and wildlife photography, the Canon lens is an exceptional choice at $239.00. However, if you prioritize low-light performance, professional image quality, and are willing to invest more, the Sigma lens priced at $919.00 offers superior optics and versatility. Each lens has unique strengths that cater to different photographers, making the decision a matter of personal preference and intended use.