Sigma 18- vs VILTROX
Updated July 2026 — Sigma 18- wins on price and aperture, VILTROX wins on weight and focal length.
The Sigma 18-50mm offers superior versatility and optical performance, while the VILTROX 35mm excels in low-light conditions and affordability.
Why Sigma 18- is better
Versatility
Sigma offers a zoom range of 18-50mm.
Optical Quality
Sigma has superb optical performance.
Build Quality
Sigma is compact and lightweight.
Why VILTROX is better
Low-Light
VILTROX has a larger aperture of f/1.7.
Price
VILTROX is significantly cheaper at $179.
Autofocus
VILTROX features fast and silent autofocus.
Overall score
Specifications
| Spec | Sigma 18- | VILTROX |
|---|---|---|
| Optical Quality | Excellent | Very Good |
| Low-Light | Good | Excellent |
| Autofocus | Good | Excellent |
| Versatility | High | Medium |
| Price | $587 | $179 |
Dimension comparison
Overview of the Sigma 18-50mm F2.8 DC DN Contemporary
The Sigma 18-50mm F2.8 DC DN Contemporary is a versatile lens designed for Sony E-mount cameras. Priced at $587.00, it offers a compact design with a constant aperture of F2.8, making it suitable for various photography styles. This lens is particularly known for its superb optical quality and in-camera aberration correction, which enhances image clarity and detail. The lens weighs significantly less than many competitors, making it an excellent choice for photographers who prioritize portability without sacrificing performance.
Overview of the VILTROX 35mm f1.7 Fuji
The VILTROX 35mm f1.7 Fuji is an affordable option at $179.00, targeted toward Fujifilm X-mount users. This lens features a bright maximum aperture of f/1.7, which excels in low-light conditions and provides beautiful background blur, ideal for portrait and street photography. With a sophisticated optical design that includes 11 elements in 9 groups, the VILTROX lens minimizes chromatic aberrations and distortion. Additionally, it boasts fast autofocus capabilities, making it a versatile choice for both stills and video work.
Price Comparison
When it comes to pricing, the Sigma 18-50mm is significantly more expensive at $587.00 compared to the VILTROX 35mm, which retails at $179.00. This places the VILTROX lens about 70% cheaper than the Sigma lens, making it a budget-friendly option for photographers. The price difference may influence buyers who are looking for performance without breaking the bank. While the Sigma lens offers a broader focal range and constant aperture, the VILTROX provides an exceptional value proposition for those who need a reliable lens for less.
Optical Performance
The Sigma 18-50mm is renowned for its superb optical quality, featuring advanced technology that combines excellent performance with compactness. Its in-camera aberration correction helps produce sharp and vibrant images. In contrast, the VILTROX 35mm f1.7 lens, with its optimized optical design, includes special elements to minimize optical flaws. This lens delivers outstanding image quality and is particularly praised for its ability to capture vivid colors and details. Both lenses perform admirably, but the Sigma may have the edge in optical versatility due to its zoom capabilities.
Focal Length Versatility
The Sigma 18-50mm lens offers a versatile focal length that ranges from 18mm to 50mm. This makes it suitable for a wide array of photography styles, including landscapes, portraits, and street photography. The flexibility of a zoom lens allows photographers to adapt to various shooting scenarios without the need to change lenses frequently. On the other hand, the VILTROX 35mm provides a fixed focal length, which can be advantageous for those who prefer to work within a specific range. While the fixed focal length can lead to creative compositions, it lacks the versatility of the Sigma's zoom capability.
Low-Light Capability
Low-light performance is a critical factor for many photographers, and this is where the VILTROX 35mm f1.7 excels. Its large maximum aperture of f/1.7 allows for exceptional light-gathering ability, making it ideal for shooting in dim environments. This feature also contributes to a beautiful bokeh effect in portraits. In comparison, while the Sigma 18-50mm has a constant aperture of f/2.8, it does not reach the same low-light performance level as the VILTROX. For photographers who often work in challenging lighting conditions, the VILTROX lens may be the more suitable choice.
Autofocus Performance
The VILTROX 35mm f1.7 features a new STM motor that provides fast and near-silent autofocus, which is beneficial for both photography and video recording. This lens also minimizes focus breathing, ensuring smooth transitions during focus adjustments. The Sigma 18-50mm lens, while competent in autofocus, does not specify similar advanced features. The VILTROX's focus capabilities make it particularly appealing for videographers who require precise control over focus during dynamic shoots. This aspect could be a deciding factor for users in the video production space.
Build Quality and Design
While both lenses are designed with usability in mind, the Sigma 18-50mm is known for its compact and lightweight construction. This makes it easy to carry around, especially for long shooting sessions. The VILTROX 35mm also boasts thoughtful design details, including an extended lens hood for protection against stray light and a USB-C upgrade port for firmware updates. Both lenses offer solid build quality, but the design elements of the VILTROX cater to modern users who value adaptability and ease of use.
Which should you buy?
Choosing between the Sigma 18-50mm F2.8 DC DN Contemporary and the VILTROX 35mm f1.7 Fuji ultimately depends on your specific needs and budget. If you require a versatile zoom lens with excellent optical performance and don't mind spending more, the Sigma is a strong contender. However, if you're looking for a budget-friendly lens with exceptional low-light capabilities and fast autofocus, the VILTROX offers impressive value. Consider your photography style and the situations in which you'll be shooting to make the best choice for your needs.

