Canon RF50mm F1.8 STM Lens, Fixed Focal Length Prime Lens vs VILTROX
Updated July 2026 — Canon RF50mm F1.8 STM Lens, Fixed Focal Length Prime Lens wins on compatibility and aperture, VILTROX wins on portability and weight.
The Canon RF50mm F1.8 STM lens offers excellent performance for EOS R users, while the VILTROX 25mm f1.7 lens provides great value and portability for Sony users.
Why Canon RF50mm F1.8 STM Lens, Fixed Focal Length Prime Lens is better
Better Aperture
Canon has a larger f/1.8 aperture compared to VILTROX's f/1.7.
Brand Reputation
Canon is a well-established brand in photography.
Compatibility
Canon lens is specifically designed for EOS R series.
Why VILTROX is better
Lower Price
VILTROX is priced at $176, making it more affordable.
Lightweight
VILTROX weighs only 170 grams, enhancing portability.
Advanced Autofocus
VILTROX supports eye and face detection for better tracking.
Overall score
Specifications
| Spec | Canon RF50mm F1.8 STM Lens, Fixed Focal Length Prime Lens | VILTROX |
|---|---|---|
| Focal Length | 50mm | 25mm |
| Max Aperture | f/1.8 | f/1.7 |
| Weight | 200g | 170g |
| Autofocus Type | STM | STM |
| Lens Elements | 6 | 12 |
Dimension comparison
Overview of the Canon RF50mm F1.8 STM Lens
The Canon RF50mm F1.8 STM lens is priced at $219.00, making it a robust option for EOS R series camera users. This lens offers a fixed 50mm focal length, which is ideal for a variety of photography styles, including portraits and landscapes. The large f/1.8 aperture enhances low-light performance and provides a beautiful background blur, making it an attractive choice for creative image-making. Its compact design means it can easily be carried around, ensuring you're always ready to capture the moment.
Overview of the VILTROX 25mm f1.7 E-Mount Lens
On the other hand, the VILTROX 25mm f1.7 E-Mount lens is available for $176.00, making it about 17% cheaper than the Canon option. This lens is designed for Sony E-Mount cameras and features a large f/1.7 aperture, which allows for stunning bokeh and excellent low-light capabilities. Weighing only 170 grams, its lightweight construction makes it highly portable, perfect for spontaneous photography sessions. The lens also supports efficient autofocus, enhancing the shooting experience for both stills and video.
Autofocus Performance
The Canon RF50mm F1.8 STM lens employs a Stepping Motor (STM) for smooth and quiet autofocus, ideal for both video recording and photography. This feature is essential for capturing sharp images without distracting noise, especially in quiet environments. In comparison, the VILTROX 25mm f1.7 lens also incorporates a built-in STM motor, which offers precise autofocus and supports eye and face detection. This enhances its ability to track moving subjects effectively. Both lenses provide reliable autofocus, but the VILTROX may edge out slightly in responsiveness due to its advanced focus tracking capabilities.
Image Quality
In terms of image quality, the Canon RF50mm F1.8 lens boasts optimized lens placement and coatings that minimize ghosting and flare while delivering outstanding color balance. This means your images will maintain clarity and vibrancy, whether in well-lit conditions or low-light scenarios. The VILTROX 25mm f1.7 lens features an optical structure with 12 elements in 10 groups, including ED and aspherical lenses, which contribute to its high-definition image quality. Both lenses produce excellent results, but the VILTROX's advanced optical design may provide a slight advantage in sharpness and detail.
Design and Portability
The Canon RF50mm F1.8 STM lens is compact and lightweight, which makes it a convenient addition to any camera bag. Its small size allows for on-the-go photography while maintaining high-quality performance. Meanwhile, the VILTROX 25mm f1.7 lens is even lighter, weighing just 170 grams, making it an excellent choice for photographers who prioritize portability. The lightweight design of the VILTROX lens, combined with its compact size, makes it ideal for impromptu shoots, whether in urban environments or natural settings.
Versatility and Compatibility
The Canon RF50mm F1.8 STM lens is specifically compatible with the EOS R series mirrorless cameras, ensuring seamless integration and optimal performance. This fixed focal length lens is versatile enough for a range of photography styles, from portraits to landscapes. Conversely, the VILTROX 25mm f1.7 lens is designed for a broader range of Sony E-Mount cameras, including high-end models like the A7RIV and A1. This compatibility widens its appeal to Sony users who seek a reliable prime lens for various applications, making it a versatile option for many photographers.
Price and Value
The Canon RF50mm F1.8 STM lens is priced at $219.00, while the VILTROX 25mm f1.7 lens is available for $176.00. This price difference of about $43 means that the VILTROX lens offers a more budget-friendly option without compromising on essential features like aperture size and autofocus capabilities. For photographers looking to save on costs while still enjoying high-quality optics, the VILTROX lens provides significant value in terms of pricing.
Which should you buy?
Choosing between the Canon RF50mm F1.8 STM lens and the VILTROX 25mm f1.7 E-Mount lens ultimately depends on your camera system and specific photography needs. If you own an EOS R series camera and desire a reliable, compact lens for diverse shooting scenarios, the Canon RF50mm lens is a solid choice. However, if you're a Sony user looking for a lightweight, budget-friendly lens that excels in autofocus and image quality, the VILTROX 25mm lens stands out as an excellent option. Ultimately, both lenses deliver impressive performance, so your decision should align with your camera compatibility and shooting preferences.

