Canon EF vs Canon RF-S10-
Updated July 2026 — Canon EF wins on focal length, Canon RF-S10- wins on weight and diameter.
The Canon RF-S10-18mm offers greater versatility for wide-angle photography and vlogging, while the Canon EF 50mm excels in portrait photography at a lower price.
Why Canon EF is better
Price
Canon EF 50mm is significantly cheaper.
Portraits
Better for portrait photography.
Low Light
Wider aperture for low-light performance.
Why Canon RF-S10- is better
Versatility
Better for vlogging and wide-angle shots.
Optical Quality
Superior image quality across the frame.
Design
Optimized for mirrorless systems.
Overall score
Specifications
| Spec | Canon EF | Canon RF-S10- |
|---|---|---|
| Focal Range | 50mm | 10-18mm |
| Aperture | f/1.8 | f/4.5-6.3 |
| Min Focus | 1.15 ft | 0.5 ft |
| Autofocus | STM | STM |
| Ideal For | Portraits | Vlogging |
Dimension comparison
Overview
This comparison examines two Canon lenses: the Canon EF 50mm f/1.8 STM Lens and the Canon RF-S10-18mm F4.5-6.3 IS STM Ultra-Wide-Angle Zoom Lens. The former is priced at $155.99, while the latter costs $279.00, making the EF 50mm about 44% cheaper. Each lens offers unique features tailored to different photography needs, catering to both portraiture and wide-angle shooting.
Design and Build Quality
The Canon EF 50mm f/1.8 STM Lens is a compact, normal-length prime lens designed for everyday shooting. Its lightweight build makes it easy to carry, while its simple design focuses on functionality. In contrast, the Canon RF-S10-18mm features a more complex optical design, optimized for mirrorless systems, and includes two Ultra-low Dispersion glass elements for superior image quality. The RF-S10-18mm lens is also lightweight and compact, making it suitable for travel and vlogging. Both lenses emphasize portability but cater to different styles of photography.
Optical Performance
The Canon EF 50mm f/1.8 has a maximum aperture of f/1.8, allowing it to perform well in low-light conditions and providing excellent control over depth of field. Its Super Spectra coating minimizes flare and ghosting, enhancing contrast and color accuracy. On the other hand, the RF-S10-18mm lens offers an ultra-wide-angle view, with a focal range of 10-18mm, equivalent to 16-29mm on APS-C cameras. This lens is designed to deliver outstanding image quality across the frame, making it ideal for landscapes and interiors. Both lenses excel in their respective categories, but the RF-S10-18mm's versatility shines in wide-angle photography.
Autofocus and Usability
The Canon EF 50mm f/1.8 employs a stepping motor (STM) for near-silent autofocus, making it suitable for both movies and still photography. It features a minimum focusing distance of 1.15 ft (0.35m) and a maximum magnification of 0.21x, which is beneficial for capturing detailed portraits. Conversely, the RF-S10-18mm also utilizes STM technology, ensuring quiet and efficient autofocus. With a maximum magnification of 0.23x in AF mode, it excels in capturing small subjects while maintaining sharpness. Both lenses provide user-friendly autofocus systems, but the RF-S10-18mm may offer more versatility for video content creators.
Target Audience
The Canon EF 50mm f/1.8 is ideal for portrait photographers, hobbyists, and anyone looking to achieve high-quality images without breaking the bank. Its bright aperture and ability to create beautiful bokeh make it a favorite among portraitists. In contrast, the Canon RF-S10-18mm is tailored for vloggers, travel enthusiasts, and those who need a wide field of view. Its ultra-wide-angle perspective allows for creative compositions, making it suitable for capturing expansive landscapes or tight interiors. Each lens addresses the needs of different users, providing options for both casual photographers and serious content creators.
Price Comparison
At $155.99, the Canon EF 50mm f/1.8 is significantly more affordable than the Canon RF-S10-18mm, which retails for $279.00. This price difference of $123.01 reflects the varying target markets and functionalities of the lenses. For casual shooters or those on a budget, the EF 50mm presents a compelling option without compromising on quality. However, for users seeking versatility in wide-angle photography and video, the investment in the RF-S10-18mm may be justified, given its advanced features suited for dynamic shooting environments.
Compatibility and System
The Canon EF 50mm f/1.8 is compatible with Canon's full-frame and APS-C cameras, making it a versatile choice for a wide range of Canon users. It effectively operates at an 80mm equivalent focal length on APS-C cameras, adding to its usability for portrait photography. The RF-S10-18mm, designed specifically for Canon's EOS R series mirrorless cameras, optimally utilizes the new optical design for enhanced performance. While the EF 50mm offers broader compatibility, the RF-S10-18mm is a specialized choice for users invested in the mirrorless system, catering to the growing demand for such cameras.
Which should you buy?
Choosing between the Canon EF 50mm f/1.8 STM Lens and the Canon RF-S10-18mm F4.5-6.3 IS STM Ultra-Wide-Angle Zoom Lens ultimately depends on your photography needs. If you prioritize portrait photography and require a lens that excels in low-light conditions, the EF 50mm is a fantastic, cost-effective choice at $155.99. However, if your focus is on vlogging, wide-angle shots, or capturing expansive landscapes, the RF-S10-18mm, though pricier at $279.00, offers features that enhance versatility and image quality. Both lenses serve specific purposes well, so your decision should align with your photographic goals and equipment compatibility.

