SIGMA 18- vs VILTROX
Updated July 2026 — SIGMA 18- wins on price and weight, VILTROX wins on focal length.
The SIGMA lens offers versatility and build quality, while the VILTROX lens excels in low-light performance and affordability.
Why SIGMA 18- is better
Price
SIGMA lens is more versatile despite higher cost
Build Quality
SIGMA lens has rubber sealing for durability
Focal Length
SIGMA lens offers a zoom range for various photography styles
Why VILTROX is better
Aperture
VILTROX lens has a brighter f/1.7 aperture
Weight
VILTROX lens is lighter at 171g
Autofocus
VILTROX lens features quiet autofocus for video
Overall score
Specifications
| Spec | SIGMA 18- | VILTROX |
|---|---|---|
| Type | Zoom | Prime |
| Compatibility | Canon RF | Fujifilm X |
| Min Focus | 12.1cm | 0.5m |
| Optical Design | N/A | 9 groups, 11 pieces |
| Bokeh | N/A | Nine-blade |
Dimension comparison
Price Comparison
When considering the price, the VILTROX 56mm F1.7 Fuji XF is significantly more affordable at $180.00 compared to the SIGMA 18-50mm F2.8 DC DN Contemporary Lens, which is priced at $599.99. This makes the VILTROX lens about 70% cheaper than its SIGMA counterpart. For photographers on a budget or those just starting, the lower price of the VILTROX lens can be a compelling reason to choose it over the more expensive SIGMA lens.
Build Quality and Design
The SIGMA 18-50mm lens boasts a lightweight and compact design, weighing only 300g and featuring a maximum diameter of 69.2mm. It is also rubber-sealed, making it suitable for various environmental conditions. In contrast, the VILTROX lens is even lighter at 171g, which enhances its portability, making it ideal for travel. While both lenses are designed for mirrorless cameras, the robust rubber sealing of the SIGMA lens may provide an edge in durability against the elements.
Focal Length and Aperture
The SIGMA lens features a versatile focal length of 18-50mm with a constant aperture of f/2.8, allowing for a variety of shooting scenarios. This range makes it suitable for everything from landscapes to close-up shots. On the other hand, the VILTROX 56mm lens has a fixed focal length of 56mm, providing an equivalent focal length of 85mm on APS-C format cameras, which is excellent for portrait photography. Additionally, the VILTROX lens has a brighter maximum aperture of f/1.7, allowing for better performance in low-light conditions and more creative control over depth of field.
Autofocus Performance
The VILTROX 56mm lens features a stepper motor for quiet autofocus, which is particularly beneficial for video recording as it minimizes noise. This is a key advantage for content creators who require silent operation. Conversely, the SIGMA lens does not specify its autofocus technology, leaving some uncertainty regarding its performance in comparison. The quiet autofocus of the VILTROX lens makes it particularly appealing for videographers and photographers who often shoot in quiet environments.
Optical Quality
In terms of optical performance, the VILTROX lens boasts a complex optical structure with 9 groups and 11 pieces, including 4 ED lenses and 3 high refraction index lenses. This design helps to minimize chromatic aberrations and other optical anomalies. While the SIGMA lens is known for its high-performance optics, specific optical details are not provided. The advanced optical design of the VILTROX lens suggests it could yield sharper images with better color accuracy, particularly in portrait photography.
Versatility
The SIGMA 18-50mm lens shines in versatility due to its zoom capabilities, making it suitable for various types of photography, from landscapes to macro shots with a minimum focusing distance of 12.1cm. This feature allows photographers to achieve a maximum magnification of 1:2.8, which is advantageous for capturing detailed close-up images. In contrast, the VILTROX lens, being a prime lens, offers a more limited focal length but excels in portraiture. The choice between these two will depend on the photographer's specific needs—whether they prefer the adaptability of a zoom lens or the artistic capabilities of a prime lens.
Compatibility
The SIGMA lens is designed for Canon RF mount mirrorless cameras, ensuring seamless integration with Canon's latest models. On the other hand, the VILTROX lens is compatible with a wide range of Fujifilm X-mount cameras, including popular models like the X-T5 and X-T4. This wide compatibility could appeal to Fujifilm users looking for a high-performance lens that maximizes their camera's capabilities. Photographers should consider their camera system when selecting between these two lenses to ensure compatibility.
Which should you buy?
In conclusion, the choice between the SIGMA 18-50mm F2.8 DC DN Contemporary Lens and the VILTROX 56mm F1.7 Fuji XF ultimately depends on your specific photographic needs and budget. If you're looking for a high-quality, versatile zoom lens and are willing to invest more, the SIGMA lens offers a robust option. However, if you're focused on portrait photography and require a budget-friendly lens with excellent low-light performance, the VILTROX lens is a compelling choice. Each lens has its strengths, making it essential for photographers to evaluate their priorities before making a purchase.

