Canon RF45mm F1.2 STM vs Viltrox
Updated July 2026 — Canon RF45mm F1.2 STM wins on price and build, Viltrox wins on weight and aperture.
The Canon RF45mm F1.2 STM offers superior image quality and build, while the Viltrox 25mm F1.7 E is a budget-friendly option for casual users.
Why Canon RF45mm F1.2 STM is better
Image Quality
Canon's f/1.2 aperture provides better low-light performance and bokeh.
Build Quality
Canon lens has a more robust design suitable for professional use.
Autofocus Speed
Canon lens offers quicker and more precise autofocus.
Why Viltrox is better
Price
Viltrox is significantly cheaper at $176.
Weight
Viltrox is lighter at 170g, making it more portable.
Compatibility
Viltrox is compatible with a wider range of Sony E-mount cameras.
Overall score
Specifications
| Spec | Canon RF45mm F1.2 STM | Viltrox |
|---|---|---|
| Max Aperture | f/1.2 | f/1.7 |
| Lens Type | Prime | Prime |
| Mount Type | RF | E |
| Weight | Not Specified | 170g |
| Autofocus | Yes | Yes |
Dimension comparison
Overview of the Canon RF45mm F1.2 STM and Viltrox 25mm F1.7 E
The Canon RF45mm F1.2 STM is priced at $469.00, making it a premium option for photographers seeking high-quality results. In comparison, the Viltrox 25mm F1.7 E is significantly more budget-friendly at $176.00, which is about 62% less than the Canon lens. This price difference highlights the varying target audiences for these lenses, with the Canon lens aiming for professionals and serious enthusiasts, while the Viltrox lens caters to casual users and those looking for an economical choice.
Image Quality Comparison
When it comes to image quality, the Canon RF45mm F1.2 STM excels with its wide f/1.2 aperture. This allows for exceptional low-light performance and the ability to create beautiful bokeh, effectively isolating subjects from the background. The lens utilizes a PMo aspheric lens to reduce aberrations, a notable advancement for Canon in this aperture range. Meanwhile, the Viltrox 25mm F1.7 E also offers a bright f/1.7 maximum aperture, which is beneficial for low-light situations and depth of field control, although it may not match the Canon in terms of overall image quality and bokeh effect.
Design and Build Quality
The Canon RF45mm F1.2 STM features a robust design suitable for professional use, reflecting its premium pricing. Its compact design, paired with advanced optical technology, makes it a reliable choice for various shooting conditions. On the other hand, the Viltrox 25mm F1.7 E weighs only 170g, making it exceptionally portable and ideal for travel. While the lightweight design of the Viltrox lens is advantageous for everyday use, it may not offer the same level of durability and professional build quality as the Canon lens.
Autofocus Performance
Autofocus capabilities are crucial for both lenses, and each offers distinct advantages. The Canon RF45mm F1.2 STM’s autofocus system is designed for quick and precise focusing, making it well-suited for portrait and event photography. Meanwhile, the Viltrox 25mm F1.7 E employs an STM stepper motor that provides a quiet autofocus experience, reducing the chances of disrupting video or photo shoots. Although both lenses support autofocus, the Canon lens may have an edge in speed and accuracy, especially in challenging lighting conditions.
Use Cases and Versatility
For photographers looking to capture stunning portraits, the Canon RF45mm F1.2 STM is a clear favorite due to its large aperture, which allows for greater creative control over depth of field and beautiful background separation. This lens is perfect for lifestyle content and narrative-driven photography, where the aesthetics of the image are paramount. In contrast, the Viltrox 25mm F1.7 E is versatile for general photography and video, especially for users of Sony E-mount cameras. Its lightweight and compact design make it suitable for travel and everyday use, appealing to vloggers and casual photographers.
Compatibility with Camera Systems
The Canon RF45mm F1.2 STM is designed specifically for Canon's RF mount cameras, ensuring optimal performance with models like the Canon EOS R series. This dedicated compatibility means users can fully leverage the lens's advanced features. The Viltrox 25mm F1.7 E is tailored for Sony E-mount cameras, including popular models like the ZV-E10 and A7 series, making it an excellent option for Sony users. This highlights how each lens caters to specific camera systems, which should be a key consideration for potential buyers.
Price and Value Proposition
The price difference between the two lenses is significant. At $469.00, the Canon RF45mm F1.2 STM is a premium investment that promises high-quality images and robust performance for serious photographers. In contrast, the Viltrox 25mm F1.7 E, priced at $176.00, offers great value for those who want decent performance without breaking the bank. This makes the Viltrox lens an attractive option for beginners or those on a budget, while the Canon lens appeals to professionals who demand the best in image quality.
Which should you buy?
Ultimately, the decision between the Canon RF45mm F1.2 STM and the Viltrox 25mm F1.7 E hinges on your specific needs and budget. If you prioritize superior image quality, low-light performance, and professional build quality, the Canon lens is the clear choice despite its higher price. However, if you're looking for a lightweight, affordable lens that still delivers great performance for everyday photography and video, the Viltrox lens is an excellent alternative. Your choice should reflect your photography style, camera system, and how much you're willing to invest in your gear.