vsversusfinder

Sigma 17- vs VILTROX AF

Updated July 2026 — Sigma 17- wins on price and weight, VILTROX AF wins on view angle and aperture.

The Sigma 17-40mm F1.8 DC offers superior versatility and image quality, while the VILTROX AF 9mm F2.8 is a budget-friendly option with excellent ultra-wide capabilities.

Why Sigma 17- is better

Versatility

Sigma's zoom range allows for varied compositions.

Image Quality

Art-series optics deliver professional sharpness.

Aperture

Constant F1.8 aperture excels in low-light.

Why VILTROX AF is better

Price

VILTROX is significantly cheaper.

Weight

VILTROX is more portable and lightweight.

Ultra-Wide

VILTROX offers a wider field of view.

Overall score

Sigma 17-
85
VILTROX AF
70

Specifications

SpecSigma 17-VILTROX AF
AutofocusStandardFast & Silent
Lens TypeZoomPrime
CompatibilitySony ESony E
Creative UseVersatileUltra-Wide
Optical SeriesArtAir

Dimension comparison

Sigma 17-VILTROX AF

Overview of the Sigma 17-40mm F1.8 DC and VILTROX AF 9mm F2.8

The Sigma 17-40mm F1.8 DC is a versatile zoom lens, while the VILTROX AF 9mm F2.8 is an ultra-wide-angle prime lens. Both lenses are designed for Sony E-mount cameras, catering to different photographic needs. The Sigma lens is priced at $919.00, making it a higher-end option, while the VILTROX lens is significantly more affordable at $199.00, which is about 78% cheaper than the Sigma.

Optical Performance

When it comes to optical performance, the Sigma 17-40mm F1.8 DC is equipped with a bright F1.8 constant aperture, ideal for low-light conditions and achieving creative depth effects. This Art-series lens is designed to deliver sharp detail and professional image quality, making it suitable for a range of photography styles, from portraits to travel. In contrast, the VILTROX AF 9mm F2.8 features a bright F2.8 aperture that excels in low-light scenarios as well. However, its ultra-wide 113.8° view is particularly advantageous for landscapes and vlogging, providing expansive perspectives that the Sigma cannot match.

Autofocus Capabilities

Autofocus performance is a critical factor for photographers, especially in dynamic shooting environments. The VILTROX AF 9mm F2.8 boasts a fast and silent autofocus system powered by a high-precision STM stepping motor, ensuring smooth and reliable focus for both photos and videos. While the Sigma lens does not specifically highlight its autofocus capabilities, its design for dynamic shooting implies effective focus performance, though it may not be as advanced as the VILTROX’s system. Thus, for videographers and content creators, the VILTROX may offer a more appealing autofocus experience.

Build Quality and Design

In terms of design, the Sigma 17-40mm F1.8 DC is built with professional use in mind, incorporating Art-series optics that signify a high standard of quality. The VILTROX AF 9mm F2.8, being part of the Air series, is notably lightweight and portable, making it a convenient option for travel or outdoor photography. It features a metal lens mount and a compact design, which can be a significant advantage for photographers seeking to minimize gear weight. The VILTROX’s compactness enhances its usability for those who prioritize convenience without compromising on image quality.

Creative Versatility

The Sigma 17-40mm F1.8 DC excels in creative versatility, as its zoom range allows for a variety of compositions, from tight portraits to expansive landscapes. This flexibility is complemented by its constant aperture, which facilitates shooting in diverse lighting conditions. Conversely, the VILTROX AF 9mm F2.8 is designed to inspire creativity through its ultra-wide-angle perspective. It enables dramatic close-up shots with unique exaggerated perspectives, which can be particularly beneficial for creative compositions in architectural or interior photography.

Price Comparison

The price disparity between the two lenses is significant. The Sigma 17-40mm F1.8 DC is priced at $919.00, while the VILTROX AF 9mm F2.8 is available for just $199.00. This means that the VILTROX is about $720 less expensive than the Sigma, making it a compelling option for budget-conscious photographers. Despite the price difference, both lenses offer unique features tailored to different shooting styles, appealing to a wide range of users.

Target Audience

The target audience for these two lenses varies significantly due to their price and features. The Sigma 17-40mm F1.8 DC is likely aimed at professional photographers or serious enthusiasts who require high-quality optics and versatility for various photographic applications. On the other hand, the VILTROX AF 9mm F2.8 is more suited for hobbyists, vloggers, or those new to photography who want a lightweight, affordable lens that excels in ultra-wide-angle shots. The lower price point and ease of use of the VILTROX make it an attractive option for beginners.

Which should you buy?

Choosing between the Sigma 17-40mm F1.8 DC and the VILTROX AF 9mm F2.8 ultimately depends on your specific needs and budget. If you prioritize versatility, professional image quality, and are willing to invest more, the Sigma lens is the superior choice. However, if you are looking for an affordable, ultra-wide-angle lens that excels in creative applications, the VILTROX offers tremendous value at a significantly lower price. Consider your photographic style and requirements to make the best decision for your needs.