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Canon RF35mm F1.8 is Macro STM Lens, Black vs SIRUI

Updated July 2026 — Canon RF35mm F1.8 is Macro STM Lens, Black wins on weight and size, SIRUI wins on low-light and versatility.

The Canon RF35mm F1.8 is a versatile macro lens at a lower price, while the SIRUI 20mm T1.8 offers advanced features for filmmakers. Choose based on your primary needs.

Why Canon RF35mm F1.8 is Macro STM Lens, Black is better

Price

Canon lens is $100 cheaper

Macro Capability

Canon lens offers macro features

Compactness

Canon lens is lighter and easier to carry

Why SIRUI is better

Cinematic Quality

SIRUI lens provides a 2.35:1 widescreen ratio

Low-Light Performance

SIRUI lens has a faster T1.8 aperture

Autofocus Features

SIRUI lens includes advanced autofocus capabilities

Overall score

Canon RF35mm F1.8 is Macro STM Lens, Black
78
SIRUI
85

Specifications

SpecCanon RF35mm F1.8 is Macro STM Lens, BlackSIRUI
Focal Length35mm20mm
Aperturef/1.8T1.8
Magnification0.5x1.33x
Mount TypeCanon RFE Mount
Image CircleFull FrameSuper 35

Dimension comparison

Canon RF35mm F1.8 is Macro STM Lens, BlackSIRUI

Overview of the Canon RF35mm F1.8 is Macro STM Lens

The Canon RF35mm F1.8 is Macro STM Lens offers versatility for both general photography and macro work. Priced at $499.00, it is a compact lens that features a minimum focusing distance of 0.56 feet, making it suitable for close-up shots. This lens is designed to be compatible with Canon's EOS R series cameras, ensuring high-quality performance for users of Canon's mirrorless line. Its optical image stabilization, which provides up to 5 stops of shake correction, enhances image clarity, especially in challenging lighting conditions.

Overview of the SIRUI 20mm T1.8 1.33X Anamorphic Lens

The SIRUI 20mm T1.8 1.33X Anamorphic Lens is priced at $599.00 and offers a unique cinematic viewing experience. It features a 1.33x squeeze factor that allows for a stunning 2.35:1 widescreen ratio, making it ideal for filmmakers and video creators looking to achieve a cinematic look without cropping. This lens is optimized for APS-C and Super 35 sensors, ensuring excellent image clarity. With a fast T1.8 aperture, it excels in low-light conditions and provides remarkable depth of field control, giving creators the ability to craft visually striking scenes.

Price Comparison

When it comes to price, the Canon RF35mm F1.8 is Macro STM Lens is about 17% cheaper than the SIRUI 20mm T1.8, with a difference of $100.00. The Canon lens is priced at $499.00, while the SIRUI lens retails for $599.00. This price gap may influence budget-conscious photographers or videographers who need to consider their spending without compromising too much on quality.

Intended Use and Versatility

The Canon RF35mm F1.8 is a macro lens that excels in both general photography and macro shooting, thanks to its 0.5x magnification ratio. It’s particularly effective for capturing detailed close-ups while also functioning well in wider scenes. On the other hand, the SIRUI 20mm T1.8 is designed primarily for cinematic applications, offering a wide-angle perspective that is perfect for landscape, architecture, and creative filmmaking. This specialization means that users need to choose based on their primary photography or videography needs.

Autofocus and Control Features

The SIRUI 20mm T1.8 lens comes with selectable manual and autofocus features, powered by a precision STM stepping motor. This allows for smooth and quiet autofocus, which is crucial for video work. It also includes eye-tracking capabilities and an AF/MF switch, giving users a high level of creative control. In contrast, the Canon RF35mm F1.8 offers a control ring for direct setting changes but does not specify advanced autofocus features. For video creators, the SIRUI lens’s autofocus capabilities may provide a significant advantage.

Low-Light Performance

In terms of low-light performance, the SIRUI 20mm T1.8 shines with its ultra-fast aperture of T1.8, allowing more light to enter and enabling better performance in dim conditions. This capability reduces the need for high ISO settings, promoting clearer night scenes and enhancing depth of field effects. While the Canon RF35mm F1.8 does have a wide aperture of f/1.8, it is not specifically highlighted for low-light capabilities in the same cinematic context as the SIRUI. This difference may sway those focused on low-light videography toward the SIRUI lens.

Size and Portability

The Canon RF35mm F1.8 is known for its compact design, making it lightweight and easy to carry for everyday photography. This aspect is crucial for photographers who need to move quickly or travel frequently. Conversely, the SIRUI 20mm T1.8, while also designed to be compact and lightweight, weighs in at 480g (1.06 lb), which is slightly heavier due to its wider design and additional features. Users may prefer the Canon lens for casual use, while the SIRUI lens may be more suited for dedicated shooting environments.

Which should you buy?

Choosing between the Canon RF35mm F1.8 is Macro STM Lens and the SIRUI 20mm T1.8 1.33X Anamorphic Lens ultimately depends on your specific needs. If you are primarily a photographer looking for a versatile lens that offers macro capabilities at a lower price point, the Canon lens would be a great choice. However, if you are a videographer seeking to create cinematic visuals with advanced autofocus features, the SIRUI lens may justify its higher price. Each lens caters to different users, making your intended use a crucial factor in your decision.