Canon RF vs lightdow EF/EF-S 420-
Updated July 2026 — Canon RF wins on focus speed and aperture, lightdow EF/EF-S 420- wins on weight.
The Canon RF 50mm F1.8 STM Lens excels in image quality and versatility, while the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens offers budget-friendly long-range capabilities.
Why Canon RF is better
Image Quality
Superior low-light performance and sharpness.
Autofocus
Fast and silent STM autofocus.
Versatility
Suitable for various photography styles.
Why lightdow EF/EF-S 420- is better
Price
More affordable option for budget-conscious photographers.
Focal Length
Long-range capabilities for distant subjects.
Manual Focus
Allows for precise control over settings.
Overall score
Specifications
| Spec | Canon RF | lightdow EF/EF-S 420- |
|---|---|---|
| Aperture | f/1.8 | f/8.3 |
| Focal Length | 50mm | 420-800mm |
| Autofocus | Yes | No |
| Compatibility | RF Mount | EF/EF-S Mount |
| Price | $219.00 | $67.99 |
Dimension comparison
Overview of the Canon RF 50mm F1.8 STM Lens
The Canon RF 50mm F1.8 STM Lens is a lightweight and compact option tailored for EOS R-Series cameras. Priced at $219.00, it offers a wide f/1.8 aperture that excels in low-light conditions and provides beautiful background blur, making it an excellent choice for portrait photography. Users can expect sharp images and smooth, fast, near-silent autofocus thanks to its STM motor. This lens also features an aspheric lens element and Super Spectra Coating, enhancing image quality and minimizing flare.
Overview of the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens
The EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens, available for $67.99, is designed for photographers seeking long-range capabilities. This lens offers a remarkable focal length range, allowing for detailed shots from a distance. It emphasizes a fully manual focus design, giving photographers creative freedom and precise control over their images. While it lacks electronic contacts for focusing, it provides a learning opportunity for photographers to master manual settings effectively. Its wide compatibility with various Canon models makes it a versatile choice for many users.
Image Quality Comparison
When it comes to image quality, the Canon RF 50mm F1.8 STM Lens shines with its wide aperture, ideal for producing sharp images with excellent bokeh. The aspheric lens element and Super Spectra Coating contribute to its ability to minimize aberrations, ensuring high-quality results even in challenging lighting conditions. In contrast, the EF/EF-S 420-800mm F8.3 lens, while capable of capturing distant subjects, may not match the RF lens in terms of low-light performance due to its narrower aperture range. Users can expect a maximum aperture of f/8.3 at 420mm, which limits the depth of field effects compared to the 50mm lens.
Autofocus Performance
The autofocus performance of the Canon RF 50mm F1.8 STM Lens is one of its standout features, utilizing an STM motor for smooth and rapid focusing. This near-silent operation is particularly beneficial for video recording and discreet photography. The EF/EF-S 420-800mm F8.3 lens, on the other hand, relies on manual focus, which may be a disadvantage for those accustomed to automatic focusing systems. While manual focus allows for precision, it requires more time and effort, potentially slowing down the shooting process, especially in fast-paced environments.
Versatility in Shooting Scenarios
The Canon RF 50mm F1.8 STM Lens is highly versatile, suitable for various photography styles including portraits, street photography, and even close-up shots. Its compact design makes it easy to carry, allowing for spontaneous shooting opportunities. Conversely, the EF/EF-S 420-800mm F8.3 lens is tailored for long-distance photography, making it ideal for wildlife and sports photography. However, its bulkier size and manual focus may limit its usability in everyday situations, making it less versatile than the 50mm lens.
Price Comparison
At a price of $219.00, the Canon RF 50mm F1.8 STM Lens is significantly more expensive than the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens, which retails for $67.99. This represents a price difference of about 69%, with the RF lens costing more than three times as much. While the RF lens offers advanced features and superior performance, the lower-priced telephoto zoom lens provides an attractive option for budget-conscious photographers looking for long-range capabilities without breaking the bank.
Build Quality and Design
The Canon RF 50mm F1.8 STM Lens is designed with a focus on portability and ease of use. Its lightweight and compact body make it an excellent choice for travel and street photography. In contrast, the EF/EF-S 420-800mm F8.3 lens is larger and bulkier due to its telephoto design, which may not be as convenient for casual shooters. However, both lenses exhibit a solid build quality, ensuring durability for regular use. The RF lens's advanced optical elements contribute to its overall high performance, while the telephoto lens’s manual focus mechanism allows for greater adaptability in creative settings.
Which should you buy?
Choosing between the Canon RF 50mm F1.8 STM Lens and the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens ultimately depends on your photography needs. If you prioritize image quality, low-light performance, and versatility, the RF 50mm lens is the clear winner, despite its higher price tag. However, if you're looking for an economical option that allows for long-distance shooting and you're comfortable with manual focus, the EF/EF-S 420-800mm lens offers significant value. Evaluate your shooting style and budget to make an informed decision.

