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Nikon NIKKOR Z vs SIRUI

Updated July 2026 — Nikon NIKKOR Z wins on price and versatility, SIRUI wins on weight and aperture.

The Nikon NIKKOR Z 40mm f/2 is a versatile and affordable option for photographers, while the SIRUI 20mm T1.8 offers specialized features for filmmakers. Choose based on your primary use case.

Why Nikon NIKKOR Z is better

Price

Nikon lens is more budget-friendly at $276.95

Weight

Nikon lens is lighter than SIRUI lens

Versatility

Nikon lens is suitable for various photography styles

Why SIRUI is better

Cinematic Features

SIRUI lens offers anamorphic capabilities for filmmakers

Low-Light Performance

SIRUI lens has a wider aperture for better low-light shooting

Autofocus Control

SIRUI lens provides selectable manual and autofocus options

Overall score

Nikon NIKKOR Z
75
SIRUI
85

Specifications

SpecNikon NIKKOR ZSIRUI
Max Aperturef/2T1.8
Focal Length40mm20mm
AutofocusYesYes
Lens TypePrimeAnamorphic
Field of View60mm (DX)22mm (FF)

Dimension comparison

Nikon NIKKOR ZSIRUI

Overview of the Nikon NIKKOR Z 40mm f/2 and SIRUI 20mm T1.8

The Nikon NIKKOR Z 40mm f/2 is priced at $276.95, while the SIRUI 20mm T1.8 1.33X Anamorphic Lens is significantly higher at $599.00. This substantial price difference highlights the distinct target audiences and functionalities of these two lenses. The Nikon lens is aimed at everyday photography, while the SIRUI lens caters to filmmakers seeking cinematic visuals.

Design and Build Quality

The Nikon NIKKOR Z 40mm f/2 features a compact and lightweight design, making it an excellent choice for photographers who value portability. In contrast, the SIRUI 20mm T1.8, while also lightweight at 480g, is specifically engineered for cinematic use, with a design that supports advanced video capabilities. Both lenses are built to meet the rigorous demands of their respective users, but the SIRUI's design emphasizes its anamorphic qualities, providing filmmakers with a unique aesthetic.

Image Quality

Image quality is a critical consideration, and both lenses excel in their domains. The Nikon NIKKOR Z 40mm f/2 offers a fast f/2 maximum aperture, delivering a shallow depth of field for beautiful background blur and subject isolation. Meanwhile, the SIRUI 20mm T1.8 boasts a wide T1.8 aperture, allowing more light to enter, which enhances low-light performance and provides soft bokeh. The SIRUI’s 1.33x squeeze factor creates a cinematic 2.35:1 widescreen ratio, making it suitable for professional video production.

Autofocus Performance

Autofocus capabilities differ significantly between the two lenses. The Nikon NIKKOR Z 40mm f/2 features a fast and quiet autofocus system designed for both photography and video, suppressing focus breathing effectively. On the other hand, the SIRUI 20mm T1.8 is equipped with a precision STM stepping motor that offers selectable manual and autofocus options, providing filmmakers with complete creative control. This makes the SIRUI particularly attractive to videographers who require precise focus adjustments during shooting.

Compatibility

When it comes to compatibility, the Nikon NIKKOR Z 40mm f/2 is designed specifically for FX and DX format Nikon Z series mirrorless cameras. This means it seamlessly integrates with Nikon's ecosystem. The SIRUI 20mm T1.8 is compatible with a wider range of E mount cameras, including popular models like the Sony A6500 and FX3. This broader compatibility allows the SIRUI lens to appeal to a larger segment of the market, particularly those involved in videography.

Creative Applications

Both lenses cater to different creative needs. The Nikon NIKKOR Z 40mm f/2 is versatile enough for street photography, landscapes, and portraits, making it an ideal all-rounder for casual photographers. Conversely, the SIRUI 20mm T1.8 is tailored for cinematographers, offering features that enhance storytelling through visuals. Its ability to create a dramatic widescreen look makes it perfect for capturing expansive landscapes and dynamic scenes.

Price Consideration

The price difference between these two lenses is notable, with the SIRUI 20mm T1.8 retailing for about 116% more than the Nikon NIKKOR Z 40mm f/2. At $276.95, the Nikon lens is a more budget-friendly option for general photography. This affordability makes it accessible to amateur photographers and enthusiasts alike. In contrast, the higher price of the SIRUI lens reflects its specialized features and target market, justifying the investment for professionals who require high-quality cinematic capabilities.

Which should you buy?

Choosing between the Nikon NIKKOR Z 40mm f/2 and the SIRUI 20mm T1.8 ultimately depends on your specific needs. If you’re a photographer seeking a lightweight, versatile prime lens for various shooting scenarios, the Nikon NIKKOR Z 40mm f/2 is an excellent choice, especially given its affordability at $276.95. However, if your focus is on video production and you require advanced features like anamorphic capabilities, the SIRUI 20mm T1.8, despite its higher price of $599.00, offers unique advantages that can elevate your cinematography.