SIRUI vs Tamron 25-
Updated July 2026 — SIRUI wins on price, Tamron 25- wins on focal length and weight.
The SIRUI 20mm T1.8 lens excels in cinematic quality, while the Tamron 25-200mm offers versatility for various photography styles.
Why SIRUI is better
Price
SIRUI is $300 cheaper than Tamron
Cinematic Quality
SIRUI provides a 2.35:1 widescreen ratio
Weight
SIRUI is lighter at 480g
Why Tamron 25- is better
Versatility
Tamron covers a wide focal length from 25mm to 200mm
Autofocus Speed
Tamron's VXD autofocus is faster for action shots
Close-Focusing
Tamron offers 1:1.9 magnification for half-macro shots
Overall score
Specifications
| Spec | SIRUI | Tamron 25- |
|---|---|---|
| Aperture | T1.8 | F2.8-5.6 |
| Focal Length | 20mm | 25-200mm |
| Weight | 480g | 575g |
| Close Focus | N/A | 1:1.9 |
| Autofocus Type | STM | VXD |
Dimension comparison
Overview of the SIRUI 20mm T1.8 Anamorphic Lens
The SIRUI 20mm T1.8 1.33X Anamorphic Lens is designed for those who seek cinematic quality in their footage. Priced at $599.00, this lens is particularly optimized for APS-C sensors, providing a 2.35:1 widescreen ratio in 16:9 mode. Its 1.33x squeeze factor is ideal for videographers wanting to achieve a cinematic look without cropping. This lens features both autofocus and manual focus modes, powered by a precision STM stepping motor, ensuring smooth and quiet operation, which is essential for filmmakers capturing live action.
Overview of the Tamron 25-200mm F/2.8-5.6 Di III VXD G2
The Tamron 25-200mm F/2.8-5.6 Di III VXD G2 is a versatile all-in-one zoom lens, priced at $899.00. This lens offers a remarkable focal length range, making it suitable for a wide array of photography styles, from everyday shots to creative expressions. With a fast F2.8 aperture at the wide end, it allows for excellent low-light performance and depth of field control. The lens also boasts a close-focusing ability with a maximum magnification ratio of 1:1.9, making it effective for half-macro photography, which adds to its versatility as a go-to lens for many photographers.
Build Quality and Design
The SIRUI 20mm T1.8 lens is compact and lightweight, weighing only 480g. This makes it an excellent choice for handheld shooting and gimbal work, appealing to independent creators and professional filmmakers. Its robust design is specifically tailored for E mount cameras, ensuring compatibility and ease of use. On the other hand, the Tamron 25-200mm lens is designed to be portable, making it a convenient option for photographers who want a single lens to cover multiple shooting scenarios. While the Tamron lens is slightly heavier due to its zoom capabilities, it still maintains a compact form factor, making it manageable for everyday use.
Autofocus and Performance
The SIRUI 20mm T1.8 features selectable manual and autofocus capabilities, powered by a fast and quiet STM stepping motor. This allows for precise focusing, which is essential for video production where noise can be a distraction. The autofocus includes eye-tracking capabilities, offering an edge for filmmakers needing accurate subject tracking. Conversely, the Tamron 25-200mm lens incorporates Tamron’s VXD linear motor, delivering fast and accurate autofocus suitable for capturing action shots, like children or pets in motion. This makes both lenses strong candidates for different types of photography and videography, although they cater to slightly different needs.
Image Quality
The SIRUI 20mm T1.8 lens is optimized for Super 35 sensors, ensuring excellent image clarity and performance. Its T1.8 ultra-fast aperture allows for stunning low-light photography and soft bokeh effects, which are highly valued in cinematic work. In contrast, the Tamron 25-200mm lens offers improved optical performance with refined sharpness across its zoom range. It excels in delivering detail-rich images, especially when close-focusing, making it a strong candidate for capturing detailed shots in various lighting conditions.
Price Comparison
The SIRUI 20mm T1.8 is priced at $599.00, while the Tamron 25-200mm is available for $899.00. This means that the SIRUI lens is approximately 33% cheaper than the Tamron lens, making it a more budget-friendly option for those specifically looking for an anamorphic lens. However, the higher price of the Tamron lens reflects its versatility as an all-in-one zoom lens, catering to photographers who prefer a single lens for multiple shooting scenarios.
Ideal Use Cases
The SIRUI 20mm T1.8 is ideally suited for filmmakers and videographers who want to achieve a cinematic feel in their work. Its wide-angle perspective and anamorphic characteristics make it perfect for capturing expansive landscapes and dynamic scenes. In contrast, the Tamron 25-200mm is designed for general photographers and those who appreciate versatility in a lens. Its extensive zoom range from 25mm to 200mm allows it to adapt to various shooting conditions, from portraits to wildlife photography.
Which should you buy?
Choosing between the SIRUI 20mm T1.8 Anamorphic Lens and the Tamron 25-200mm F/2.8-5.6 Di III VXD G2 largely depends on your specific needs and shooting style. If your focus is on achieving a cinematic look and you primarily shoot video, the SIRUI lens offers a more specialized solution at a lower price point. However, if you prefer versatility and the ability to handle different types of photography with one lens, the Tamron lens is worth its higher price for its all-in-one capabilities. Each lens serves its purpose well, so your decision should hinge on whether you prioritize cinematic quality or versatility in your photography.

