Canon RF100- vs SIRUI Night Walker
Updated July 2026 — Canon RF100- wins on stabilization and autofocus, SIRUI Night Walker wins on price and weight.
The Canon RF100-400mm excels in autofocus and stabilization, making it ideal for wildlife and sports photography, while the SIRUI Night Walker offers excellent low-light performance at a lower price.
Why Canon RF100- is better
Autofocus
Canon features high-speed autofocus with Nano USM.
Image Stabilization
Canon provides up to 6 stops of stabilization.
Zoom Range
Canon offers a versatile 100-400mm zoom range.
Why SIRUI Night Walker is better
Price
SIRUI is significantly cheaper at $279.
Low-Light Performance
SIRUI has a large T1.2 aperture for low-light shooting.
Weight
SIRUI is lighter at around 500g.
Overall score
Specifications
| Spec | Canon RF100- | SIRUI Night Walker |
|---|---|---|
| Aperture | F5.6-8 | T1.2 |
| Focal Length | 100-400mm | 35mm |
| Image Stabilization | Yes | No |
| Autofocus | Yes | Manual |
| Minimum Focus | 2.89ft | 1.31ft |
Dimension comparison
Overview of the Canon RF100-400mm F5.6-8 IS USM
The Canon RF100-400mm F5.6-8 IS USM is a versatile telephoto lens designed for wildlife, sports, and travel photography. Priced at $699.00, this lens offers a compact and lightweight design while delivering high image quality across its zoom range. It features a significant zoom capability, reaching up to 400mm, making it ideal for capturing distant subjects with clarity.
This lens includes an Optical Image Stabilizer that corrects shake by up to 5.5 stops, and can achieve up to 6 stops of stabilization when paired with compatible EOS R series cameras. The RF100-400mm is perfect for photographers looking for a robust lens that balances convenience and performance, making it a solid investment for both amateur and professional photographers.
Overview of the SIRUI Night Walker 35mm S35 Manual Focus Cine Lens
The SIRUI Night Walker 35mm S35 Manual Focus Cine Lens is designed for filmmakers seeking high-quality performance in low-light conditions. With a price tag of $279.00, this lens is significantly more affordable, costing about 60% less than the Canon RF100-400mm. Its large T1.2 aperture allows for exceptional low-light shooting without the need for high ISO settings, which minimizes noise and enhances image quality.
This lens is particularly aimed at users of E-mount cameras and offers outstanding optical performance, including sharpness and minimal focus breathing. Its sturdy aluminum housing makes it a durable choice for on-the-go filmmakers, while its lightweight design (about 500g) ensures portability. For those focused on video production, the SIRUI Night Walker provides aesthetic and functional advantages.
Image Stabilization Capabilities
When it comes to image stabilization, the Canon RF100-400mm excels with its Optical Image Stabilizer. It provides up to 6 stops of shake correction when paired with EOS R series cameras, making it a superior choice for handheld shooting in dynamic environments. This feature is particularly beneficial when photographing fast-moving subjects, as it helps maintain clarity and detail.
In contrast, the SIRUI Night Walker lacks built-in image stabilization, which may be a drawback for some users, especially those filming in low-light conditions or without a tripod. While the SIRUI lens offers exceptional optical performance, the absence of stabilization means filmmakers may need to rely on steadicam rigs or tripods to achieve the best results.
Focusing Mechanism and Usability
The Canon RF100-400mm features high-speed and smooth autofocus thanks to Canon’s Nano USM technology, which ensures quick and quiet focusing. This is crucial for wildlife and sports photography, as it allows for rapid adjustments without disturbing the subject or drawing attention.
On the other hand, the SIRUI Night Walker 35mm is a manual focus lens, which may appeal to filmmakers who prefer precise control over their focus points. The focus ring has a rotation angle of 270°, allowing for detailed adjustments. However, this may be a limitation for photographers who rely on autofocus for capturing fleeting moments.
Target Audience and Use Cases
The primary audience for the Canon RF100-400mm is wildlife and sports photographers who require a versatile telephoto lens with fast autofocus and image stabilization. Its robust features make it suitable for capturing distant subjects with clarity and precision. This lens is also ideal for travel photography, where portability and performance are essential.
Conversely, the SIRUI Night Walker 35mm is tailored more for filmmakers and videographers who prioritize low-light performance and manual control. Its large aperture and outstanding optical characteristics make it perfect for documentary, portrait, and aesthetic-focused video projects. This lens is an excellent choice for those who want to craft visually compelling narratives.
Build Quality and Design
The Canon RF100-400mm is designed with a compact and lightweight structure, which enhances its portability, making it easier to carry during long shoots. It also features a control ring for quick adjustments, enhancing the user experience during fast-paced scenarios.
The SIRUI Night Walker, while also lightweight, boasts a strong aluminum cine housing that protects the internal optical elements. This design choice offers durability while maintaining a manageable weight, making it suitable for extended use in various shooting conditions. Both lenses exhibit high-quality craftsmanship, but their design philosophies cater to different shooting styles and preferences.
Price Comparison
The price difference between these two lenses is substantial. The Canon RF100-400mm is priced at $699.00, while the SIRUI Night Walker comes in at $279.00. This makes the SIRUI lens about 60% cheaper than its Canon counterpart. For budget-conscious buyers or those just starting in filmmaking, the SIRUI lens presents a compelling option without compromising on quality.
However, the investment in the Canon lens may be justified for serious photographers who need the advanced features, such as autofocus and image stabilization, that the SIRUI lens does not offer. The choice ultimately depends on the specific needs of the user and their intended use for the lens.
Which should you buy?
Choosing between the Canon RF100-400mm F5.6-8 IS USM and the SIRUI Night Walker 35mm S35 Manual Focus Cine Lens boils down to your specific needs and shooting style. If you are a wildlife or sports photographer looking for a high-performance telephoto lens with excellent autofocus and image stabilization, the Canon RF100-400mm is the clear winner. However, if you are a filmmaker focused on low-light performance and manual control, the SIRUI Night Walker offers exceptional value at a significantly lower price point. Ultimately, evaluate your priorities in photography or videography to make the best choice.

