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Nikon NIKKOR Z 24- vs SIGMA 18-

Updated July 2026 — Nikon NIKKOR Z 24- leads on price and weight.

The Nikon NIKKOR Z 24-70mm f/2.8 S II excels in performance and versatility, while the SIGMA 18-50mm F2.8 offers a budget-friendly option with compact design.

Why Nikon NIKKOR Z 24- is better

Zoom Range

Nikon offers a wider zoom range of 24-70mm.

Autofocus

Nikon's autofocus is 5x faster and 50% quieter.

Image Quality

Nikon has superior optical performance and bokeh.

Why SIGMA 18- is better

Price

SIGMA is significantly cheaper at $599.99.

Weight

SIGMA is lighter at 300g.

Compact Size

SIGMA is the smallest in its class.

Overall score

Nikon NIKKOR Z 24-
92
SIGMA 18-
75

Specifications

SpecNikon NIKKOR Z 24-SIGMA 18-
Focal Length24-70mm18-50mm
Aperturef/2.8f/2.8
Max Magnification0.32x1:2.8
Weather SealingYesYes
Focus Distance9.5in12.1cm

Dimension comparison

Nikon NIKKOR Z 24-SIGMA 18-

Overview

When comparing the Nikon NIKKOR Z 24-70mm f/2.8 S II and the SIGMA 18-50mm F2.8 DC DN Contemporary Lens, discerning photographers will find distinct features tailored to different needs. The Nikon lens, priced at $2,796.95, offers superior zoom capabilities and advanced autofocus, while the SIGMA lens is more compact and affordable at $599.99.

Build Quality

The Nikon NIKKOR Z 24-70mm f/2.8 S II boasts an internal zoom mechanism that enhances stability and weather resistance, making it ideal for professional use. This design minimizes changes in the center of gravity when zooming, which is beneficial when using gimbals or matte boxes. In contrast, the SIGMA 18-50mm F2.8 is lightweight and compact, weighing only 300 grams, making it the smallest in its class. Its rubber-sealed mount allows for versatility in various environments, but it may not match the ruggedness of the Nikon lens.

Autofocus Performance

Autofocus is a critical feature for many photographers, and here the Nikon lens excels. Its autofocus system is reported to be five times faster and 50% quieter than its predecessor, which is particularly advantageous during video recording. The SIGMA lens, while efficient, does not highlight specific speed metrics but is designed for high performance in a compact package. Thus, the Nikon lens is better suited for those who prioritize quick and silent autofocus during intense shooting scenarios.

Zoom Versatility

The Nikon NIKKOR Z 24-70mm f/2.8 S II offers a versatile focal length range from 24mm to 70mm, making it a standard for professional photography. This lens excels in various settings, from landscapes to portraits, with a close focus capability of 9.5 inches at 24mm. The SIGMA 18-50mm F2.8, while offering a respectable range of 18mm to 50mm, is more limited and tailored mainly for wide-angle photography. This difference makes the Nikon lens more versatile overall, suited for a broader range of shooting situations.

Image Quality

Both lenses promise high image quality, but the Nikon lens takes the lead with its advanced optical formula. It is designed to enhance sharpness, bokeh, and anti-glare performance significantly. The combination of a constant f/2.8 aperture and 11 rounded diaphragm blades in the Nikon lens creates beautiful, soft bokeh, ideal for professional work. The SIGMA lens, while high-quality, does not specify the same optical advancements, which may be a consideration for photographers whose work relies heavily on image quality.

Close-Up Capability

The Nikon lens allows for close focus at 9.5 inches and a maximum magnification of 0.32x at 70mm, providing excellent detail for close-up photography. In comparison, the SIGMA lens has a minimum focusing distance of 12.1 cm, with a maximum magnification of 1:2.8. While both lenses allow for close-up shots, the Nikon's superior capabilities in this area make it a choice for those looking to capture intricate details in their images.

Price Comparison

The price difference between these two lenses is substantial, with the Nikon NIKKOR Z 24-70mm f/2.8 S II retailing at $2,796.95 and the SIGMA 18-50mm F2.8 at a much lower $599.99. This makes the SIGMA lens approximately 78% cheaper than the Nikon lens. For photographers on a budget or those who do not require the extensive features of the Nikon lens, the SIGMA presents a compelling option without sacrificing too much in quality or performance.

Which should you buy?

Choosing between the Nikon NIKKOR Z 24-70mm f/2.8 S II and the SIGMA 18-50mm F2.8 DC DN Contemporary Lens largely depends on your specific needs and budget. If you are a professional photographer seeking high performance, advanced autofocus, and versatile zoom capabilities, the Nikon lens is likely the better investment despite its higher price. Conversely, if you're looking for a lightweight, compact lens that offers good performance at a significantly lower price, the SIGMA lens is an excellent choice. Ultimately, the decision should align with your shooting style and requirements.