Canon RF35mm F1.8 is Macro STM Lens, Black vs SIGMA 18-
Updated July 2026 — Canon RF35mm F1.8 is Macro STM Lens, Black wins on min focus and weight, SIGMA 18- wins on price and focal length.
The Canon RF35mm F1.8 excels in macro photography and low-light performance, while the SIGMA 18-50mm F2.8 offers versatility for various shooting scenarios.
Why Canon RF35mm F1.8 is Macro STM Lens, Black is better
Price
Canon is $100 cheaper
Macro Capability
Canon has a minimum focusing distance of 0.56 ft.
Low-Light Performance
Canon has a wider maximum aperture of f/1.8
Why SIGMA 18- is better
Zoom Range
SIGMA offers a versatile 18-50mm range
Build Quality
SIGMA features a rubber-sealed mount
Weight
SIGMA is lighter at 300g
Overall score
Specifications
| Spec | Canon RF35mm F1.8 is Macro STM Lens, Black | SIGMA 18- |
|---|---|---|
| Brand | Canon | Sigma |
| Type | Macro | Zoom |
| Stabilization | Yes | No |
| Compatibility | EOS R | RF Mount |
| Control Ring | Yes | No |
Dimension comparison
Overview of the Canon RF35mm F1.8 and SIGMA 18-50mm F2.8
When comparing the Canon RF35mm F1.8 and the SIGMA 18-50mm F2.8, the key takeaway is their distinct functionalities catering to different photography styles. The Canon RF35mm F1.8 is a versatile macro lens ideal for close-up photography, while the SIGMA 18-50mm F2.8 offers a flexible zoom range suitable for various shooting scenarios. The Canon lens is priced at $499.00, and the SIGMA lens at $599.99, making the Canon about 17% cheaper.
Optical Performance
The optical performance of both lenses differs significantly due to their design. The Canon RF35mm F1.8 features a maximum aperture of f/1.8, which allows for excellent low-light performance and beautiful bokeh. This lens also includes Optical Image Stabilization, providing up to 5 stops of shake correction, helping to maintain image clarity in challenging conditions. In contrast, the SIGMA 18-50mm F2.8 has a constant aperture of f/2.8, which is versatile but does not perform as well in low-light scenarios as the Canon's wider aperture.
Focusing Capabilities
Focusing capabilities vary considerably between the two lenses. The Canon RF35mm F1.8 has a minimum focusing distance of just 0.56 feet (0.17 meters), allowing photographers to capture intricate macro shots with a magnification ratio of 0.5x. This feature makes it particularly appealing to those interested in detailed close-ups of subjects. The SIGMA 18-50mm F2.8, on the other hand, boasts a minimum focusing distance of 12.1 cm and a maximum magnification of 1:2.8, which is impressive for a zoom lens but does not match the macro capabilities of the Canon.
Build Quality and Design
In terms of build quality, both lenses are designed with practicality in mind. The Canon RF35mm F1.8 is compact and lightweight, making it easy to carry for extended periods. Its control ring allows for direct setting changes, enhancing user experience. The SIGMA 18-50mm F2.8 emphasizes a lightweight design as well, weighing only 300 grams. Furthermore, it features a rubber-sealed mount, making it suitable for various environments, which adds an element of durability to its design.
Compatibility and Mounting
Compatibility is another crucial factor to consider. The Canon RF35mm F1.8 is specifically designed for Canon's EOS R series cameras, ensuring seamless integration and optimal performance. On the other hand, the SIGMA 18-50mm F2.8 is also tailored for Canon RF mount mirrorless cameras, allowing photographers to enjoy high-performance zoom capabilities without sacrificing compatibility. Both lenses serve the same camera system, making them equally accessible to Canon users.
Price Comparison
Price plays a significant role in the decision-making process. The Canon RF35mm F1.8 is currently priced at $499.00, while the SIGMA 18-50mm F2.8 is listed at $599.99. This price difference of approximately $100 means that the Canon is about 17% more affordable, which could be a decisive factor for budget-conscious photographers. The Canon lens also has an average price of $515.78 over the last 90 days, indicating that it’s generally a stable investment.
User Experience
User experience can vary based on the intended usage of each lens. The Canon RF35mm F1.8 excels in macro photography, providing users with a unique experience of capturing details that are often overlooked. Its compact size and image stabilization make it user-friendly for both beginners and seasoned photographers. Conversely, the SIGMA 18-50mm F2.8 is designed for versatility, catering to those who prefer a zoom lens that can adapt to a range of shooting environments. Its lightweight build ensures that photographers can carry it without fatigue, making it a great option for everyday use.
Which should you buy?
Ultimately, the choice between the Canon RF35mm F1.8 and the SIGMA 18-50mm F2.8 will depend on your specific photography needs. If you prioritize macro photography and low-light performance, the Canon RF35mm F1.8 is the clear winner, offering specialized features at a lower price point. However, if you are looking for a versatile zoom lens that can handle various shooting situations, the SIGMA 18-50mm F2.8 may be the better option, despite its higher price. Each lens has its strengths, so understanding your photography style is essential in making the right choice.

