SIRUI vs VILTROX
Updated July 2026 — SIRUI wins on price and weight, VILTROX wins on field of view and focal length.
The SIRUI 20mm T1.8 is ideal for filmmakers seeking advanced features, while the VILTROX 50mm F2 offers great value for casual photographers.
Why SIRUI is better
Cinematic Features
SIRUI offers a 1.33x squeeze for cinematic visuals.
Low Light Performance
SIRUI has a T1.8 aperture for better low-light shooting.
Wide Angle
SIRUI provides a wider field of view for landscapes.
Why VILTROX is better
Price
VILTROX is significantly cheaper at $199.
Weight
VILTROX is lighter at 205g, making it more portable.
Bokeh Quality
VILTROX's 9-blade aperture enhances background blur.
Overall score
Specifications
| Spec | SIRUI | VILTROX |
|---|---|---|
| Autofocus | STM with eye-tracking | STM for photos/videos |
| Optical Structure | 13 elements | 13 elements |
| Bokeh | Good | Excellent |
| Close-Up | 0.5m | 0.51m |
| Cinematic Ratio | 2.35:1 | N/A |
Dimension comparison
Price Comparison
The SIRUI 20mm T1.8 1.33X Anamorphic Lens is priced at $599.00, while the VILTROX 50mm F2 Full Frame Lens is significantly more affordable at $199.00. This makes the VILTROX about 67% cheaper than the SIRUI lens. The price difference may be a decisive factor for those who are budget-conscious or just starting in videography and photography. While the Sirui lens offers advanced features suited for cinematic shooting, the VILTROX provides a compelling option for standard photography needs at a fraction of the cost.
Design and Build Quality
The SIRUI 20mm T1.8 is designed for filmmakers, featuring a compact and lightweight construction weighing only 480g. This makes it an excellent choice for handheld or gimbal shooting, ideal for dynamic filming environments. In contrast, the VILTROX 50mm F2 is even lighter at just 205g, making it an ultra-compact option that is easy to carry around for everyday photography. Both lenses have been optimized for their respective uses, but the VILTROX's lightweight design makes it exceptionally portable, perfect for those who value convenience in their gear.
Optics and Image Quality
The SIRUI 20mm T1.8 lens offers a 1.33x squeeze factor, delivering a cinematic widescreen ratio of 2.35:1 in 16:9 mode. This feature is particularly beneficial for video creators aiming for high-quality cinematic visuals. On the other hand, the VILTROX 50mm F2 boasts a 9-group, 13-element optical structure, which includes advanced elements for superb image quality. Its 9-blade circular aperture enhances bokeh, making it suitable for portrait photography. While the SIRUI lens excels in cinematic applications, the VILTROX provides excellent image clarity for more traditional photography.
Autofocus Capabilities
The SIRUI 20mm T1.8 features a precision STM stepping motor that allows for smooth, accurate, and quiet autofocus, making it an excellent tool for video work where noise can be an issue. It also includes eye-tracking capabilities and an AF/MF switch, which gives users more control over their shooting. Conversely, the VILTROX 50mm F2 also uses an STM for fast and reliable autofocus, making it equally effective for both photos and videos. Both lenses cater well to autofocus needs, but the SIRUI lens offers additional features that may be more appealing to videographers.
Aperture and Low Light Performance
The SIRUI 20mm T1.8 features an ultra-fast T1.8 aperture, allowing more light to enter, which is crucial for low-light conditions. This aperture not only helps in reducing ISO requirements but also enhances subject focus and background bokeh. The VILTROX 50mm F2, while slightly slower at f/2, still performs admirably with a 9-blade circular aperture that provides pleasing background blur. For users prioritizing low-light shooting, the SIRUI lens offers a clear advantage, making it a better choice for nighttime or dimly lit settings.
Focal Length and Versatility
The SIRUI 20mm lens has a horizontal field of view equivalent to a 22mm full-frame lens, making it excellent for wide-angle shots, landscapes, and tight indoor spaces. This broader perspective can create immersive cinematic visuals. On the other hand, the VILTROX 50mm is a standard prime lens, which is versatile for various subjects, particularly portraiture. While both lenses are versatile in their own right, the SIRUI's wide-angle capabilities make it particularly suitable for filmmakers, whereas the VILTROX caters more to everyday photography needs.
Target Audience
The SIRUI 20mm T1.8 is tailored for cinematographers and video creators who require advanced features for filmmaking, including the anamorphic squeeze and exceptional low-light performance. Its higher price reflects its specialized design for cinematic applications. In contrast, the VILTROX 50mm F2 appeals more to casual photographers and enthusiasts looking for a reliable, lightweight lens that performs well in a variety of situations. The choice between these two lenses essentially comes down to the specific needs of the user—whether they prioritize cinematic quality or general photography.
Which should you buy?
Choosing between the SIRUI 20mm T1.8 and the VILTROX 50mm F2 largely depends on your specific needs and budget. If you're a filmmaker looking for advanced features and superior low-light performance, the SIRUI lens is worth the investment at $599. However, if you're a photographer seeking a lightweight and affordable lens for everyday use, the VILTROX at $199 offers excellent value without compromising on image quality. Ultimately, both lenses excel in their respective areas, making your specific requirements the deciding factor.

