Sigma 17- vs VILTROX
Updated July 2026 — Sigma 17- wins on weight and versatility, VILTROX wins on focal length and close-up.
The Sigma 17-40mm F1.8 DC offers superior optical performance and versatility, while the VILTROX 50mm F2 provides an excellent budget-friendly option for portrait photography.
Why Sigma 17- is better
Optical Quality
Sigma's Art-series optics deliver sharper images.
Aperture Flexibility
Constant F1.8 aperture throughout zoom range.
Versatility
Zoom range allows for varied compositions.
Why VILTROX is better
Price
VILTROX is significantly cheaper.
Weight
VILTROX is lightweight and compact.
Close-Up Performance
VILTROX excels in close-up photography.
Overall score
Specifications
| Spec | Sigma 17- | VILTROX |
|---|---|---|
| Optical Design | Art-series optics | 9-group, 13-element |
| Autofocus | Fast and reliable | STM motor |
| Minimum Focus | 0.3m | 0.51m |
| Bokeh | Good | Excellent |
| Price | $919.00 | $199.00 |
Dimension comparison
Overview of Sigma 17-40mm F1.8 DC
The Sigma 17-40mm F1.8 DC is a versatile lens designed specifically for Sony E-mount APS-C cameras. It features a constant bright aperture of F1.8, making it an excellent choice for low-light conditions and creative depth of field effects. The price for this lens is $919.00, positioning it as a premium option for serious photographers, particularly those interested in portrait, travel, and video work.
This lens is part of Sigma's Art series, renowned for its sharp detail and professional image quality. Its design is aimed at delivering exceptional optical performance, which is crucial for both budding and experienced photographers. With such a price point, it is expected to provide top-notch performance, making it a worthy investment for those who prioritize quality in their photography gear.
Overview of VILTROX 50mm F2 Full Frame Lens
The VILTROX 50mm F2 Full Frame Lens offers a more budget-friendly choice, priced at $199.00. This lens is designed for Sony's full-frame E-mount cameras and features a focal length that excels in portrait photography and a variety of other scenarios. It's equipped with a Stepping Motor (STM) that enables fast and quiet autofocus, making it suitable for both stills and video recording.
This lens boasts a compact and lightweight design, weighing only 205 grams, which adds to its appeal for photographers who prioritize portability without sacrificing performance. The outstanding close-up capabilities, with a minimum focusing distance of 0.51 meters, make it versatile for different shooting environments. Overall, the VILTROX lens presents a solid option for photographers looking for quality at a lower price point.
Optical Performance Comparison
When it comes to optical performance, the Sigma 17-40mm F1.8 DC shines with its Art-series optics, which are engineered to deliver sharp images and professional-quality output. The constant F1.8 aperture throughout its zoom range allows for excellent light capture and creative depth effects. This makes it particularly appealing for low-light scenarios and artistic photography.
In contrast, the VILTROX 50mm F2 lens features a sophisticated 9-group, 13-element optical structure, including three ED and four HR elements, along with one aspherical element. This design aims to minimize optical aberrations and enhance overall image quality. Although it has a slightly narrower aperture of F2, it still provides impressive bokeh thanks to its 9-blade circular aperture. While both lenses offer high performance, the Sigma's constant aperture gives it an edge in versatility, especially in challenging lighting conditions.
Build Quality and Design
The Sigma 17-40mm F1.8 DC is crafted with durability in mind, reflecting its position in the premium lens market. The build quality is robust, making it suitable for frequent use in various environments, while its design is tailored for functionality and ease of handling. Its larger size and weight may be a consideration for photographers who value portability.
On the other hand, the VILTROX 50mm F2 lens is designed to be lightweight and compact, weighing only 205 grams. This makes it an excellent choice for travel and street photography, where carrying less weight is advantageous. The ultra-compact design does not compromise image quality, making it a practical option for photographers who need a reliable lens without the bulk.
Focal Length Flexibility
A key difference between the Sigma 17-40mm F1.8 DC and the VILTROX 50mm F2 is their focal length flexibility. The Sigma offers a zoom range of 17-40mm, making it suitable for a variety of shots, from wide landscapes to closer portraits. This adaptability is particularly beneficial for those who do not want to change lenses frequently during shoots.
In contrast, the VILTROX 50mm F2 is a prime lens with a fixed focal length, which can be both a limitation and a creative opportunity. While it excels in portraiture, its 50mm focal length is less versatile for landscape shots or wide-angle photography. Photographers using the VILTROX will need to be more deliberate in their composition and framing, but this can also lead to a more thoughtful approach to photography.
Price Point
The price difference between the two lenses is significant, with the Sigma 17-40mm F1.8 DC retailing at $919.00 compared to the VILTROX 50mm F2, which is priced at $199.00. This makes the VILTROX about 78% cheaper than the Sigma lens, making it a more accessible option for hobbyists and those on a tighter budget.
While the Sigma lens justifies its higher price with advanced optical features and versatility, the VILTROX offers exceptional value for its price, catering to photographers who might be starting out or looking for a reliable lens that doesn't break the bank. The choice will depend largely on the budget and specific photographic needs of the user.
Use Cases
The Sigma 17-40mm F1.8 DC is ideal for photographers who require a high-performance lens for a range of scenarios, including travel, portrait, and video applications. Its constant aperture and zoom flexibility make it suitable for various artistic expressions and environments, particularly in low-light conditions.
Conversely, the VILTROX 50mm F2 lens is particularly suited for portraiture and close-up photography, thanks to its fast aperture and excellent bokeh capabilities. Its lightweight design makes it a favorable choice for street photography and casual shooting, where convenience and portability are paramount.
Which should you buy?
Choosing between the Sigma 17-40mm F1.8 DC and the VILTROX 50mm F2 depends on your specific needs and budget. If you are looking for a versatile, high-quality lens for a variety of applications and don't mind the higher price tag, the Sigma lens is an excellent choice. However, if you are seeking a more affordable option that still delivers impressive performance, particularly for portrait photography, the VILTROX lens is a fantastic alternative. Ultimately, both lenses offer unique advantages, making the decision a matter of personal preference and photographic style.

