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Nikon NIKKOR Z vs Sigma 18-

Updated July 2026 — Nikon NIKKOR Z wins on price and aperture, Sigma 18- wins on versatility and optical quality.

The Nikon NIKKOR Z 40mm f/2 offers excellent image quality at a lower price, while the Sigma 18-50mm F2.8 provides versatility with its zoom range. Choose based on your specific needs.

Why Nikon NIKKOR Z is better

Price

Nikon is significantly cheaper at $276.95.

Weight

Nikon is more compact and lightweight.

Aperture

Nikon has a faster f/2 maximum aperture.

Why Sigma 18- is better

Versatility

Sigma offers a versatile zoom range.

Optical Quality

Sigma features superb optical quality.

Compatibility

Sigma is compatible with a wider range of subjects.

Overall score

Nikon NIKKOR Z
85
Sigma 18-
78

Specifications

SpecNikon NIKKOR ZSigma 18-
Focal Length40mm18-50mm
Max Aperturef/2f/2.8
Weight0.77 lbs0.77 lbs
AutofocusFast & QuietStandard
CompatibilityNikon ZSony E

Dimension comparison

Nikon NIKKOR ZSigma 18-

Overview of the Nikon NIKKOR Z 40mm f/2 and Sigma 18-50mm F2.8 DC DN Contemporary

The Nikon NIKKOR Z 40mm f/2 is priced at $276.95, while the Sigma 18-50mm F2.8 DC DN Contemporary costs $587.00, making it about 53% more expensive. Both lenses cater to different photography needs and styles, appealing to distinct audiences. The Nikon lens offers a compact and lightweight design suitable for various shooting scenarios, while the Sigma lens provides versatility with its zoom range.

Compatibility and Use Cases

The Nikon NIKKOR Z 40mm f/2 is compatible with FX and DX format Nikon Z series mirrorless cameras. This lens excels in street photography, landscapes, and portraits, making it a versatile choice for creative photographers. In contrast, the Sigma 18-50mm F2.8 DC DN Contemporary is designed specifically for Sony E-mount cameras, offering a focal range that caters to a wide array of shooting situations. This versatility makes the Sigma lens a great option for those who require adaptability in their photography.

Image Quality and Autofocus Performance

The Nikon NIKKOR Z 40mm f/2 delivers excellent image quality with its fast f/2 aperture, which creates a beautiful background blur and enhances subject isolation. Its fast and quiet autofocus system is designed to suppress focus breathing during video recording, ensuring smooth adjustments. Meanwhile, the Sigma 18-50mm F2.8 DC DN Contemporary is noted for its superb optical quality and in-camera aberration correction. This lens combines advanced technology with compactness, resulting in sharp images across its zoom range.

Design and Build Quality

The Nikon NIKKOR Z 40mm f/2 is compact and lightweight, making it easy to carry for extended periods, ideal for travel and street photography. It features a custom control ring that can be tailored for precise manual focusing or to adjust aperture, ISO, or exposure compensation. Conversely, the Sigma 18-50mm F2.8 DC DN Contemporary is designed with a small and light form factor, emphasizing portability without sacrificing optical performance. Both lenses reflect a commitment to quality design, though they serve different preferences in handling and usability.

Price and Value Proposition

At $276.95, the Nikon NIKKOR Z 40mm f/2 is significantly less expensive than the Sigma 18-50mm F2.8 DC DN Contemporary, which retails for $587.00. This price difference of about $310.05 could make the Nikon lens a more attractive option for entry-level photographers or those on a tighter budget. However, the Sigma lens's versatility may justify its higher price for users who need an all-in-one solution for various focal lengths.

Target Audience and Photography Styles

The Nikon NIKKOR Z 40mm f/2 is ideal for photographers who enjoy street photography, landscapes, and portraits, thanks to its natural bokeh and depth of field control. This lens is perfect for those who value simplicity and quality in a prime lens. In contrast, the Sigma 18-50mm F2.8 DC DN Contemporary is tailored for photographers who need flexibility in their focal lengths—making it a great choice for those who shoot a variety of subjects in various styles, from landscapes to close-ups.

Availability and Sales Performance

Both lenses are readily available for purchase, but there is no specific sales rank provided for either product. The Nikon NIKKOR Z 40mm f/2’s lower price point may potentially attract more buyers looking for quality without breaking the bank. However, the Sigma 18-50mm F2.8 DC DN Contemporary's reputation for optical excellence could also lead it to perform well in niche markets where quality is prioritized over cost.

Which should you buy?

Choosing between the Nikon NIKKOR Z 40mm f/2 and the Sigma 18-50mm F2.8 DC DN Contemporary ultimately depends on your specific needs and photography style. If you are looking for a budget-friendly prime lens with excellent image quality and a fast aperture, the Nikon option is a clear winner at $276.95. However, if you require a versatile zoom lens that combines compactness with superior optical performance, the Sigma lens, despite its higher price of $587.00, might be the better investment for your photography arsenal.