Nikon NIKKOR Z vs SIRUI
Updated July 2026 — Nikon NIKKOR Z wins on weight and build, SIRUI wins on focus speed.
The Nikon NIKKOR Z 50mm f/1.8 S excels in sharpness and low-light performance, while the SIRUI 20mm T1.8 Anamorphic Lens offers unique cinematic features. Choose based on your specific needs.
Why Nikon NIKKOR Z is better
Image Quality
Extreme sharpness and low distortion
Low-Light Performance
Superior performance in low-light conditions
Price
More economical option at $566.95
Why SIRUI is better
Cinematic Features
1.33x squeeze for widescreen aspect ratio
Autofocus Control
Selectable manual and autofocus options
Wide-Angle Perspective
Ideal for expansive landscapes
Overall score
Specifications
| Spec | Nikon NIKKOR Z | SIRUI |
|---|---|---|
| Aperture | f/1.8 | T1.8 |
| Focal Length | 50mm | 20mm |
| Autofocus | Yes | Yes |
| Image Circle | Full Frame | Super 35 |
| Bokeh | Excellent | Good |
Dimension comparison
Overview of the Nikon NIKKOR Z 50mm f/1.8 S and the SIRUI 20mm T1.8 Anamorphic Lens
The Nikon NIKKOR Z 50mm f/1.8 S is priced at $566.95, while the SIRUI 20mm T1.8 Anamorphic Lens is slightly higher at $599.00. Both lenses cater to different photography and videography needs, making them suitable for unique shooting scenarios. The Nikon lens focuses on delivering sharp images and excellent low-light performance, while the SIRUI lens emphasizes cinematic visuals with its anamorphic capabilities.
Image Quality and Performance
The Nikon NIKKOR Z 50mm f/1.8 S is known for its extreme sharpness and virtually zero distortion. It provides incredible performance especially in low-light conditions thanks to its f/1.8 aperture, making it a preferred choice for portrait photography and general use. Conversely, the SIRUI 20mm T1.8 Anamorphic Lens offers a 1.33x squeeze factor that delivers a cinematic 2.35:1 widescreen aspect ratio without cropping. This lens promises to cover Super 35 sensors effectively, ensuring excellent coverage and clarity, particularly for landscape and architectural shots.
Autofocus Capabilities
When it comes to autofocus, the Nikon lens integrates a new ultra-quiet stepping motor that allows for silent focusing, which is essential for video recording. In contrast, the SIRUI lens features selectable manual and autofocus options powered by a precision STM stepping motor, which enhances creative control for cinematographers. Its eye-tracking capabilities and AF/MF switch provide versatility, making it suitable for both stills and motion capture.
Aperture and Low-Light Performance
The Nikon NIKKOR Z 50mm f/1.8 S boasts an f/1.8 aperture that facilitates beautiful bokeh and superior low-light performance. This characteristic is ideal for portraits and indoor photography where lighting may be limited. On the other hand, the SIRUI 20mm T1.8 Anamorphic Lens has a similar ultra-fast T1.8 aperture. This allows for more light to enter, reducing ISO requirements and enhancing clarity in night scenes. Both lenses excel in low-light conditions, but their application differs according to the type of photography or videography being pursued.
Build Quality and Design
The Nikon NIKKOR Z 50mm f/1.8 S features a compact, lightweight, and slim unibody design, which makes it easy to handle and carry. It is designed specifically for Z Mirrorless cameras and includes compatibility with F Mount NIKKOR lenses using the FTZ Mount Adapter. In contrast, the SIRUI 20mm T1.8 Anamorphic Lens is also compact and weighs only 480g (1.06lb), making it suitable for handheld shooting or use on gimbals. Both lenses prioritize portability, but the Nikon lens is tailored specifically for the Z system.
Use Cases
The Nikon NIKKOR Z 50mm f/1.8 S is a versatile lens ideal for a variety of photography styles, including portraits, street photography, and even video work. It is especially favored for its bokeh and sharpness. Meanwhile, the SIRUI 20mm T1.8 Anamorphic Lens is tailored for filmmakers and videographers who seek to create cinematic visuals. Its wide-angle perspective and anamorphic characteristics make it perfect for expansive landscapes and creative video shots, appealing to a different segment of the market.
Price Comparison
The Nikon NIKKOR Z 50mm f/1.8 S is priced at $566.95, while the SIRUI 20mm T1.8 Anamorphic Lens costs $599.00, making the Nikon lens approximately 5.4% cheaper. This price difference might influence buyers, especially those on a budget. However, the decision should hinge more on the intended use rather than just the cost, as each lens offers unique benefits suited to different scenarios.
Which should you buy?
Choosing between the Nikon NIKKOR Z 50mm f/1.8 S and the SIRUI 20mm T1.8 Anamorphic Lens ultimately depends on your specific needs. The Nikon lens is a robust option for photographers seeking sharp images and excellent low-light performance, while the SIRUI lens is tailored for those focused on cinematic video work with its unique anamorphic characteristics. If budget is a significant factor, the Nikon lens is slightly more economical, but for filmmakers, the SIRUI may offer features worth the extra cost. Consider your shooting style and preferences before making a decision.

