Canon EF vs lightdow EF/EF-S 420-
Updated July 2026 — Canon EF wins on focus type and compatibility, lightdow EF/EF-S 420- wins on focal length and weight.
The Canon EF 50mm f/1.8 STM Lens excels in versatility and low-light performance, while the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens offers extensive zoom capabilities at a lower price.
Why Canon EF is better
Low-light performance
f/1.8 aperture vs f/8.3
Autofocus
Near-silent STM autofocus vs manual focus
Versatility
Ideal for portraits and general use vs specialized use
Why lightdow EF/EF-S 420- is better
Zoom range
420-800mm vs 50mm
Price
$67.99 vs $155.99
Manual control
Full manual focus allows for creative freedom
Overall score
Specifications
| Spec | Canon EF | lightdow EF/EF-S 420- |
|---|---|---|
| Max Aperture | f/1.8 | f/8.3 |
| Min Focus Dist. | 1.15 ft | N/A |
| Max Zoom | N/A | 800mm |
| Autofocus | Yes | No |
| Weight | 130g | 800g |
Dimension comparison
Overview of the Canon EF 50mm f/1.8 STM Lens
The Canon EF 50mm f/1.8 STM Lens is a compact and versatile lens ideal for everyday shooting. Priced at $155.99, it is particularly well-suited for portrait, action, and nighttime photography due to its wide maximum aperture of f/1.8. This lens also features a minimum focusing distance of 1.15 feet, which allows for close-up shots and a maximum magnification of 0.21x. The stepping motor (STM) ensures near-silent autofocus, making it a great option for video recording as well.
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 priced at $67.99, making it about 56% cheaper than the Canon EF 50mm f/1.8 STM Lens. This lens is designed for professional photographers who require extensive zoom capabilities. It operates fully manually, which allows for precise focus control and creative freedom, but it may not be ideal for those seeking the convenience of automatic settings. With a focal length range that extends from 420mm to 800mm, this lens captures subjects at a distance with remarkable clarity.
Focal Length and Versatility Comparison
The Canon EF 50mm f/1.8 STM Lens has a fixed focal length of 50mm, making it an excellent choice for portraits and general photography. Its effective focal length is 80mm on APS-C cameras, which adds to its versatility. In contrast, the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens offers an extensive zoom range, allowing photographers to capture faraway subjects with ease. The ability to zoom from 420mm to 800mm gives it capabilities that far exceed those of the 50mm lens, making it ideal for wildlife or sports photography. This significant difference in focal range highlights the specialized use cases of each lens.
Aperture and Light Gathering
The Canon EF 50mm f/1.8 STM Lens features a wide maximum aperture of f/1.8, which excels in low-light conditions and provides excellent depth of field control. This is particularly beneficial for isolating subjects in a photograph. The EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens has a smaller maximum aperture of f/8.3 at its shortest focal length and f/16 at its longest. This aperture range limits its effectiveness in low-light scenarios compared to the Canon lens. Photographers who frequently shoot in dimly lit environments will find the 50mm lens to be a superior choice.
Autofocus and Manual Control
Autofocus performance is a key differentiator between these two lenses. The Canon EF 50mm f/1.8 STM Lens employs a stepping motor for near-silent autofocus, making it suitable for both still photography and video. Conversely, the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens requires complete manual focus, which offers photographers more control but can also present a steeper learning curve for those not accustomed to manual settings. This makes the Canon lens more user-friendly for beginners, while the telephoto lens caters to experienced photographers seeking creative flexibility.
Compatibility and Use Cases
The Canon EF 50mm f/1.8 STM Lens is compatible with full-frame and APS-C Canon cameras, making it a versatile option for a broad range of users. Its lightweight design makes it a great everyday lens for casual photography. In contrast, the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens is compatible with a wide variety of Canon DSLR models, focusing on specialized use cases such as wildlife and sports photography. Its manual operation may appeal to photographers who want to develop their skills and explore artistic techniques.
Price and Value for Money
At $155.99, the Canon EF 50mm f/1.8 STM Lens is a solid investment for those looking for a reliable, quality lens for everyday use. The EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens, priced at $67.99, is significantly cheaper and offers extensive zoom capabilities. However, its fully manual operation may not provide the same ease of use or versatility as the Canon lens. Ultimately, the choice between these two lenses may depend more on the specific photography needs of the user rather than just the price.
Which should you buy?
The decision between the Canon EF 50mm f/1.8 STM Lens and the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens boils down to your photography style and requirements. If you prioritize versatility, ease of use, and low-light performance, the Canon EF 50mm f/1.8 STM Lens is the better choice. However, if you are an experienced photographer seeking extensive zoom capabilities at a budget-friendly price, the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens may cater to your creative pursuits. Choose based on your specific needs to maximize your photography experience.

