Canon EF-S 55- vs Canon RF50mm F1.8 STM Lens, Fixed Focal Length Prime Lens
Updated July 2026 — full head-to-head comparison.
Overview of the Canon EF-S 55-250mm F4-5.6 IS STM and Canon RF50mm F1.8 STM Lens
When considering a telephoto zoom versus a fixed focal length prime lens, both the Canon EF-S 55-250mm F4-5.6 IS STM and Canon RF50mm F1.8 STM lenses offer distinct advantages for different photography needs. The EF-S 55-250mm is priced at $329.99, while the RF50mm comes in at a more budget-friendly $219.00, making it about 17% cheaper. Each lens is designed for unique shooting scenarios, catering to diverse photography styles and preferences.
Design and Build Quality
The design aspects of these lenses highlight their intended use cases. The Canon EF-S 55-250mm F4-5.6 is a compact and lightweight telephoto zoom lens, ideal for capturing distant subjects. With a high magnification capability and a minimum focusing distance of 2.79 feet, it’s versatile in various shooting situations. Meanwhile, the Canon RF50mm F1.8 is also compact and lightweight but focuses on a fixed focal length. Its design allows for easy handling and transport, making it suitable for spontaneous shooting, especially with its large f/1.8 aperture that excels in low-light conditions.
Optical Performance
In terms of optical performance, the Canon EF-S 55-250mm is equipped with one UD lens element that significantly reduces chromatic aberration, ensuring high resolution and contrast. This lens offers a maximum magnification of 0.29x at the telephoto end, which is beneficial for wildlife and sports photography. Conversely, the Canon RF50mm boasts a PMo aspherical lens to suppress aberrations and features optimized lens placement and coatings. This results in outstanding color balance and minimal ghosting and flare, making it a solid choice for portraits and everyday photography.
Aperture and Low-Light Capability
The aperture difference between these lenses is crucial for low-light shooting. The Canon EF-S 55-250mm has a variable aperture of f/4-5.6, which may limit its effectiveness in dimly lit environments. In contrast, the Canon RF50mm features a large f/1.8 aperture, allowing for better performance in low-light conditions. The wider aperture also provides a pleasing background blur, making it ideal for portrait photography. Photographers who frequently shoot in low light will find the RF50mm's capabilities significantly more advantageous.
Autofocus and Shooting Experience
Both lenses utilize Canon's STM technology for smooth and quiet autofocus operations, but they cater to different shooting experiences. The Canon EF-S 55-250mm provides fast and silent autofocus, which is particularly beneficial for capturing moving subjects without disturbing the environment. On the other hand, the Canon RF50mm’s gear-type STM not only offers quiet AF during photos but also excels in video recording scenarios, making it a great choice for vloggers and videographers looking for seamless footage.
Compatibility and Convenience
Compatibility is a significant factor when choosing between these two lenses. The Canon EF-S 55-250mm is designed for Canon's EF-S mount cameras, whereas the RF50mm is specifically tailored for the EOS R series mirrorless cameras. This means that if you own an EOS R series camera, the RF50mm is an easy choice due to its optimized design that ensures compactness and performance. The convenience of the RF50mm also lies in its control ring, which allows for direct setting changes, enhancing the shooting experience.
Price and Value Proposition
When it comes to price, the Canon RF50mm F1.8 is clearly the more economical option at $219.00 compared to the Canon EF-S 55-250mm’s $329.99. This price difference of about $110 makes the RF50mm a compelling choice for those on a budget or just starting in photography. Despite the price, both lenses deliver excellent value in their respective categories, catering to different needs and preferences in the photography community.
Which should you buy?
Choosing between the Canon EF-S 55-250mm F4-5.6 IS STM and the Canon RF50mm F1.8 STM ultimately depends on your photography style and needs. If you prioritize versatility and the ability to capture distant subjects, the EF-S 55-250mm is a solid investment. However, if you are looking for a compact, low-light capable lens that excels in portraiture and general photography, the RF50mm offers exceptional value at a lower price point. Consider what you most need from a lens to make the best choice for your photography journey.