vsversusfinder

SIRUI vs Sony FE

Updated July 2026 — SIRUI wins on autofocus and aperture, Sony FE wins on build.

The SIRUI 20mm T1.8 offers superior features for filmmakers, while the Sony FE 40mm f/2.5 G is a solid choice for photographers. Choose based on your primary focus.

Why SIRUI is better

Cinematic Features

1.33x squeeze factor for widescreen visuals

Low-Light Performance

T1.8 aperture enhances low-light shooting

Autofocus Control

Advanced autofocus with eye-tracking capabilities

Why Sony FE is better

Build Quality

Aluminum exterior for premium durability

Compactness

Ultra-compact design for portability

Versatility

Suitable for both full-frame and APS-C cameras

Overall score

SIRUI
88
Sony FE
75

Specifications

SpecSIRUISony FE
Focal Length20mm40mm
Max ApertureT1.8f/2.5
Squeeze Factor1.33xN/A
Image CircleSuper 35Full-frame
Weight480g173g

Dimension comparison

SIRUISony FE

Overview of the SIRUI 20mm T1.8 and Sony FE 40mm f/2.5 G Lens

When it comes to choosing the right lens for your camera, the SIRUI 20mm T1.8 1.33X Anamorphic Lens and the Sony FE 40mm f/2.5 G Lens offer distinct advantages based on their specifications and intended uses. The SIRUI lens, priced at $599.00, is designed for filmmakers seeking cinematic visuals, while the Sony lens, retailing at $798.00, is a versatile option for photographers looking for a compact prime lens. The price difference is significant, with the SIRUI lens being about 25% cheaper than the Sony option.

Design and Build Quality

The SIRUI 20mm T1.8 boasts a compact and lightweight design, weighing only 480 grams (1.06 pounds), making it ideal for mobility during shoots. This lens is tailored for handheld use, fitting well with gimbals and run-and-gun setups. In contrast, the Sony FE 40mm f/2.5 G also emphasizes a lightweight profile but incorporates an aluminum exterior for a premium finish and durability. While both lenses are designed for ease of handling, the SIRUI's focus on cinematography offers a unique ergonomic advantage for video creators aiming for dynamic shooting styles.

Optical Performance

The SIRUI 20mm T1.8 features a 1.33x squeeze factor, which delivers a 2.35:1 widescreen ratio in 16:9 mode. This characteristic is particularly appealing for filmmakers looking to create cinematic visuals without cropping their footage. Additionally, its T1.8 ultra-fast aperture allows for excellent low-light performance and depth of field control. Meanwhile, the Sony FE 40mm f/2.5 G lens emphasizes sharpness across the frame, thanks to its three aspheric elements, ensuring corner-to-corner clarity. While both lenses excel in their respective areas, the SIRUI lens is specifically tailored for cinematic applications, whereas the Sony is focused on delivering sharp images for general photography.

Autofocus and Manual Control

The SIRUI 20mm T1.8 offers selectable manual and autofocus modes, featuring a precision STM stepping motor that provides smooth and quiet autofocus operation. This is particularly beneficial for videographers who require precise tracking capabilities. Its eye-tracking features and AF/MF switch enhance creative control during shoots. On the other hand, the Sony FE 40mm f/2.5 G lens does not specify advanced autofocus features, focusing instead on delivering a reliable manual experience. The SIRUI lens, therefore, stands out with its more sophisticated autofocus system, appealing to those who prioritize video performance.

Versatility and Use Cases

The SIRUI 20mm T1.8 is optimized for Super 35 sensors, making it suitable for a wide range of applications, from capturing expansive landscapes to indoor spaces. Its 20mm focal length provides a horizontal field of view equivalent to a 22mm full-frame lens, enhancing its versatility. Conversely, the Sony FE 40mm f/2.5 G lens serves both full-frame and APS-C cameras, making it a versatile choice for everyday photography. However, it lacks the specialized features that cater to filmmakers, positioning the SIRUI lens as the more adaptable option for those in the video production realm.

Price Comparison and Value

The SIRUI 20mm T1.8 is priced at $599.00, making it a cost-effective choice for filmmakers who seek high-quality anamorphic capabilities without exceeding their budget. In contrast, the Sony FE 40mm f/2.5 G is priced at $798.00, which is approximately 33% more expensive. While the Sony lens offers premium build quality and versatility for photographers, the SIRUI lens provides a unique value proposition for those specifically interested in capturing cinematic footage at a lower price point.

Target Audience

The SIRUI 20mm T1.8 is tailored for filmmakers and independent creators who require high-quality anamorphic visuals and a lightweight design for dynamic shooting scenarios. Its features cater to those who prioritize video performance. Meanwhile, the Sony FE 40mm f/2.5 G lens is designed for photographers who seek a compact lens for everyday use, emphasizing sharpness and ease of handling. Each lens targets a distinct audience, making the choice largely dependent on whether the user is focused on video or photography.

Which should you buy?

In comparing the SIRUI 20mm T1.8 and the Sony FE 40mm f/2.5 G, the decision largely hinges on your primary needs. If you are a filmmaker looking for an affordable, high-quality anamorphic lens that excels in low-light conditions and offers creative control through advanced autofocus features, the SIRUI 20mm T1.8 is an excellent choice. On the other hand, if you are a photographer seeking a versatile, compact prime lens with exceptional sharpness and premium build quality, the Sony FE 40mm f/2.5 G is worth the investment despite its higher price. Ultimately, the right lens for you will depend on whether your focus lies in video production or general photography.