Canon RF75- vs lightdow EF/EF-S 420-
Updated July 2026 — Canon RF75- wins on price and focus type, lightdow EF/EF-S 420- wins on focal length and weight.
The Canon RF75-300mm lens offers superior autofocus and portability, while the EF/EF-S 420-800mm lens is a budget-friendly option for manual focus enthusiasts.
Why Canon RF75- is better
Price
Canon lens is more expensive but offers better features.
Autofocus
Canon lens has advanced autofocus capabilities.
Portability
Canon lens is compact and lightweight.
Why lightdow EF/EF-S 420- is better
Price
Lightdow lens is significantly cheaper.
Focal Length
Lightdow lens offers a longer focal range.
Compatibility
Lightdow lens is compatible with more Canon DSLR models.
Overall score
Specifications
| Spec | Canon RF75- | lightdow EF/EF-S 420- |
|---|---|---|
| Autofocus | Yes | No |
| Manual Focus | No | Yes |
| Max Aperture | F4-5.6 | F8.3-16 |
| Lens Type | Zoom | Zoom |
| Image Stabilization | No | No |
Dimension comparison
Price Comparison
The Canon RF75-300mm F4-5.6 Zoom Lens is priced at $239.00, while the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens is significantly cheaper at $65.69, making it about 73% less expensive. This substantial price difference can be a deciding factor for budget-conscious photographers. However, while the lower price of the Lightdow lens might appeal to those looking to save money, it’s essential to consider the features and performance that come with each product when making a decision.
Build Quality and Portability
The Canon RF75-300mm lens is designed to be compact, lightweight, and portable. Weighing about as much as a 500ml water bottle, it is easy to carry and suitable for photographers on the go. In contrast, the EF/EF-S 420-800mm lens emphasizes a fully manual operation, which may require a more hands-on approach and can be less portable due to its size and design. While the manual focus can add a level of control, it may not be as user-friendly for quick shots compared to the Canon lens.
Focal Length and Versatility
In terms of focal lengths, the Canon RF75-300mm offers a versatile range that can cater to various photography styles, allowing for creative flexibility. On the other hand, the EF/EF-S 420-800mm lens boasts an impressive reach of 420-800mm, making it ideal for capturing distant subjects like wildlife and landscapes. However, this lens is strictly manual focus, which can limit its versatility in fast-paced shooting situations compared to the autofocus capabilities of the Canon lens.
Compatibility
The Canon RF75-300mm lens is specifically designed for Canon EOS R series cameras, including models such as the R100 and R5. This exclusivity means users must own compatible cameras, which might limit its appeal. In contrast, the EF/EF-S 420-800mm lens is compatible with a broader range of Canon DSLR cameras, including the EOS Rebel series and others like the 90D and 80D. This wider compatibility could make the Lightdow lens a more versatile option for those with different Canon camera bodies.
Autofocus Features
The Canon RF75-300mm features advanced autofocus capabilities, including eye detection at the 300mm zoom range. This functionality allows for precise focusing on subjects, even in motion, enhancing the shooting experience for photographers who prioritize quick and accurate autofocus. In comparison, the EF/EF-S 420-800mm lens operates entirely on manual focus, requiring the photographer to adjust the focus manually, which may not be ideal for capturing fast-moving subjects.
Included Accessories
When purchasing the Canon RF75-300mm lens, buyers receive a comprehensive package that includes a UV filter, lens cap keeper, and a cleaning kit. These accessories add significant value and convenience for maintaining the lens. Conversely, the EF/EF-S 420-800mm lens does not mention any included accessories, which might require additional purchases for proper care and maintenance. The added accessories with the Canon lens can enhance the overall photography experience right out of the box.
User Experience and Skill Level
The Canon RF75-300mm lens is user-friendly, particularly for those who may not have extensive experience with manual focus. Its autofocus features make it accessible for beginners and those who want to focus on capturing moments rather than adjusting settings constantly. In contrast, the EF/EF-S 420-800mm lens is designed for photographers who are comfortable with manual settings and are seeking to refine their skills. This lens encourages a more involved shooting process, which can be rewarding for those willing to invest the time and effort.
Which should you buy?
Choosing between the Canon RF75-300mm F4-5.6 Zoom Lens and the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens ultimately depends on your specific needs as a photographer. If you value portability, autofocus capabilities, and included accessories, the Canon lens, priced at $239.00, is the better choice. However, if your primary concern is budget and you are comfortable with manual focusing for extra reach, the Lightdow lens at $65.69 offers an attractive option. Consider your photography style and equipment compatibility to make the best decision.

