Canon RF vs lightdow EF/EF-S 420-
Updated July 2026 — Canon RF wins on focus type and aperture, lightdow EF/EF-S 420- wins on zoom and weight.
The Canon RF 50mm F1.8 STM lens is superior for low-light and portrait photography, while the EF/EF-S 420-800mm lens offers extensive zoom capabilities at a lower price.
Why Canon RF is better
Aperture
Wide f/1.8 aperture for low-light performance
Autofocus
Fast and silent autofocus with STM motor
Portability
Compact and lightweight design
Why lightdow EF/EF-S 420- is better
Zoom Range
Extensive 420-800mm zoom capability
Price
Budget-friendly at $65.69
Manual Control
Offers precise manual focus control
Overall score
Specifications
| Spec | Canon RF | lightdow EF/EF-S 420- |
|---|---|---|
| Price | $219.00 | $65.69 |
| Aperture | f/1.8 | f/8.3-16 |
| Autofocus | Yes | No |
| Zoom Range | 50mm | 420-800mm |
| Compatibility | EOS R-Series | EF/EF-S |
Dimension comparison
Overview of the Canon RF 50mm F1.8 STM Lens
The Canon RF 50mm F1.8 STM lens is designed for creative photographers seeking a versatile, compact lens. Priced at $219.00, it offers a wide f/1.8 aperture that allows for stunning background blur, making it ideal for portrait photography. This lens features an advanced STM motor, ensuring smooth, fast, and near-silent autofocus, which is particularly beneficial for candid shots or video work. The inclusion of an aspheric lens element and Super Spectra Coating enhances image quality by minimizing aberrations and improving color accuracy. With these features, the RF 50mm lens stands out as a reliable choice for EOS R-Series cameras.
Overview of the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens
The EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens is a budget-friendly option priced at $65.69, making it about 70% cheaper than the Canon RF 50mm lens. This lens is fully manual focus, allowing photographers to have precise control over focus and exposure settings. It ranges from 420mm to 800mm, providing an extensive zoom capability ideal for capturing distant subjects like wildlife and landscapes. While the manual focus may require a learning curve, it offers creative freedom and adaptability. This lens is compatible with a wide array of Canon EOS cameras, enhancing its versatility for various photography needs.
Key Features Comparison
In terms of features, the Canon RF 50mm F1.8 STM lens excels with a fast f/1.8 aperture and advanced autofocus technology. This lens is particularly beneficial for low-light conditions and achieving a shallow depth of field. In contrast, the EF/EF-S 420-800mm lens, while lacking autofocus, offers a unique zoom range that allows photographers to capture far-off subjects with detail. The 420-800mm lens operates at an aperture of f/8.3 at 420mm and f/16 at 800mm, which is significantly narrower than the f/1.8 of the Canon RF lens. Therefore, while the RF lens provides superior low-light performance, the telephoto lens offers unparalleled reach for distant photography.
Target Audience
The Canon RF 50mm F1.8 STM lens appeals to a broad audience, including portrait photographers, vloggers, and those looking to enhance their creative photography skills. Its compact design and high-quality output make it suitable for both amateurs and professionals alike. On the other hand, the EF/EF-S 420-800mm lens targets enthusiasts who are interested in wildlife or sports photography. The manual focus design caters to those willing to invest time in honing their photographic skills, making it less suitable for beginners who may prefer automatic settings.
Image Quality
When it comes to image quality, the Canon RF 50mm F1.8 STM lens is designed to produce sharp images with excellent background bokeh, thanks to its wide aperture and advanced lens design. It minimizes image distortions and enhances color fidelity, making it a strong contender for portrait and indoor photography. Conversely, the EF/EF-S 420-800mm lens focuses on long-distance capture, excelling in bringing faraway subjects closer. However, it may not offer the same level of sharpness as the RF lens in lower light conditions. The manual focus aspect may also introduce challenges in achieving optimal sharpness quickly.
Autofocus vs. Manual Focus
The Canon RF 50mm F1.8 STM lens benefits from an STM motor that ensures fast and silent autofocus, making it perfect for both photography and videography. This feature allows photographers to capture spontaneous moments without worrying about distracting noise. In contrast, the EF/EF-S 420-800mm lens is strictly manual focus, which may appeal to more experienced photographers looking to refine their skills. While the manual focus allows for more creative control, it requires the user to be more deliberate and patient, which may not suit every shooting situation, especially fast-paced environments.
Portability and Build Quality
The Canon RF 50mm F1.8 STM lens is compact and lightweight, making it easy to carry around for extended periods. Its build quality is robust enough for everyday use, ensuring reliability in various shooting conditions. On the other hand, the EF/EF-S 420-800mm lens, while offering a significant zoom range, is considerably larger and heavier, which can be cumbersome for long shoots. Its manual focus design may also require a more careful approach when handling. Therefore, for portability and ease of use, the RF 50mm lens has a clear advantage.
Which should you buy?
Ultimately, the choice between the Canon RF 50mm F1.8 STM lens and the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens depends on your photography needs and style. If you are looking for a versatile, compact lens that excels in low-light conditions and portrait photography, the RF 50mm lens is the better option at $219.00. However, if you need a budget-friendly lens with extensive zoom capabilities for capturing distant subjects and are comfortable with manual focus, the EF/EF-S 420-800mm lens at $65.69 may be more suitable. Consider your shooting preferences and the types of photography you enjoy most to make the best choice.

