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SIRUI vs Tamron 28-

Updated July 2026 — SIRUI wins on aperture, Tamron 28- wins on zoom range and weight.

The SIRUI 20mm T1.8 offers unique cinematic features at a lower price, while the Tamron 28-75mm provides versatility and a longer warranty.

Why SIRUI is better

Price

SIRUI is $150 cheaper

Cinematic Features

Anamorphic lens for filmmakers

Weight

Lighter at 480g

Why Tamron 28- is better

Versatility

Zoom range from 28mm to 75mm

Warranty

6-year limited warranty

Low-Light Performance

F/2.8 aperture for better low-light use

Overall score

SIRUI
85
Tamron 28-
90

Specifications

SpecSIRUITamron 28-
Price$599.00$749.00
Max ApertureT1.8F/2.8
Focal Length20mm28-75mm
AutofocusSTM MotorVXD Motor
WarrantyNot specified6 years

Dimension comparison

SIRUITamron 28-

Price Comparison

The SIRUI 20mm T1.8 Anamorphic Lens is priced at $599.00, making it about 17% cheaper than the Tamron 28-75mm F/2.8 Di III VXD G2, which retails for $749.00. This difference may appeal to budget-conscious photographers and videographers looking for high-quality glass without breaking the bank. While both lenses offer unique features, the price disparity could influence your choice depending on your specific needs and budget constraints.

Lens Type and Purpose

The SIRUI 20mm T1.8 is an anamorphic lens designed primarily for cinematic use, offering a 1.33x squeeze factor that produces a 2.35:1 widescreen ratio. This lens is ideal for filmmakers aiming to achieve a distinctive look with wide-angle shots. In contrast, the Tamron 28-75mm F/2.8 is a versatile standard zoom lens that caters to a broader range of photography needs, from portraiture to landscapes. Its zoom range allows for greater flexibility, making it suitable for everyday shooting scenarios.

Autofocus Capabilities

The SIRUI 20mm T1.8 features a precision STM stepping motor that provides smooth, accurate, and quiet autofocus, with added benefits like eye-tracking capabilities and an AF/MF switch. This is particularly advantageous for filmmakers who require reliable focus during video shoots. On the other hand, the Tamron 28-75mm boasts a fast, quiet VXD linear motor, enhancing its autofocus performance for both stills and video. While both lenses excel in autofocus, the SIRUI's features cater more towards cinematic needs, whereas the Tamron is designed for general photography.

Low-Light Performance

The SIRUI 20mm T1.8 excels in low-light situations, thanks to its ultra-fast T1.8 aperture. This wide aperture allows more light to enter the lens, which is especially beneficial for night scenes and when shooting in dimly lit environments. The Tamron 28-75mm also has a constant F/2.8 aperture, which provides solid low-light capabilities, but it does not match the light-gathering ability of the SIRUI. For creators focused on shooting in challenging lighting conditions, the SIRUI offers superior performance.

Build Quality and Design

The SIRUI 20mm T1.8 is compact and lightweight, weighing only 480g (1.06lbs), making it a great choice for handheld shooting and gimbal use. Its design is tailored for independent creators who need portability without sacrificing quality. In contrast, the Tamron 28-75mm is slightly bulkier but still compact at 4.7 inches long and weighing 19.4 oz. It features moisture-resistant construction and a fluorine coating, which adds durability and makes it suitable for various environments. Both lenses prioritize portability, but the SIRUI edges out in weight.

Creative Versatility

The Tamron 28-75mm provides a focal length range that allows for a variety of compositions, from wide-angle to close-up shots, with a maximum magnification ratio of 1:2.7. This flexibility makes it an excellent everyday lens for photographers. The SIRUI 20mm, while more specialized, offers a unique perspective with its wide-angle view and cinematic capabilities. It is particularly well-suited for landscape and indoor photography, but its use may be limited for those who prefer a more general-purpose lens.

Warranty and Support

The Tamron 28-75mm comes with a 6-year limited USA warranty, which adds an extra layer of assurance for buyers regarding its durability and performance. The SIRUI 20mm does not specify a warranty period in the provided information, which may lead to concerns about long-term support. This difference could be a decisive factor for potential purchasers who prioritize warranty and customer service as part of their buying decision.

Which should you buy?

Choosing between the SIRUI 20mm T1.8 and the Tamron 28-75mm F/2.8 largely depends on your specific needs as a creator. If you are focused on filmmaking and require an anamorphic lens for its cinematic qualities, the SIRUI is the better choice due to its unique features and lower price point. However, if you prefer versatility for various photography styles and appreciate the security of a long warranty, the Tamron is the superior option. Ultimately, assess your shooting style, budget, and requirements to make an informed decision that best fits your creative vision.