Canon RF 75- vs lightdow EF/EF-S 420-
Updated July 2026 — Canon RF 75- wins on weight and length, lightdow EF/EF-S 420- wins on focal length.
The Canon RF 75-300mm f/4-5.6 Lens offers superior optical quality and autofocus, making it the better choice for most photographers.
Why Canon RF 75- is better
Optical Quality
Advanced optical design with Super Spectra Coating
Autofocus
DC motor-driven autofocus system
Portability
Lightweight design at just over 1 lb
Why lightdow EF/EF-S 420- is better
Price
Significantly cheaper at $67.99
Focal Range
Extended focal length of 420-800mm
Manual Control
Fully manual focus allows for precise adjustments
Overall score
Specifications
| Spec | Canon RF 75- | lightdow EF/EF-S 420- |
|---|---|---|
| Focal Length | 75-300mm | 420-800mm |
| Aperture | f/4-5.6 | f/8.3-16 |
| Autofocus | Yes | No |
| Weight | 1.1 lbs | 2.5 lbs |
| Compatibility | RF-mount | EF/EF-S |
Dimension comparison
Overview of the Canon RF 75-300mm f/4-5.6 Lens
The Canon RF 75-300mm f/4-5.6 Lens is a versatile telephoto zoom lens designed for Canon RF-mount mirrorless cameras. With a price of $253.95, this lens offers a compact and lightweight option for photographers who require flexibility in their shooting.
This lens covers a focal length range of 75-300mm, translating to a 120-480mm equivalent on APS-C cameras. This versatility makes it suitable for various photography types, including sports, wildlife, and travel. Its build quality ensures it remains portable, weighing just over 1 lb while maintaining a modest 58mm filter thread. The lens also features an optical design optimized for sharpness and clarity, enhanced by Canon's Super Spectra Coating.
Overview of the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens
The EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens, priced at $67.99, offers a significantly longer focal range than its competitor. This lens is designed for Canon's EF/EF-S mount and provides a focal length that stretches from 420mm to 800mm, making it ideal for subjects at great distances.
Being a fully manual focus lens, it requires users to engage in precise adjustments for focus, shutter speed, and ISO, which can be advantageous for those looking to hone their skills. This lens is particularly well-suited for professional photographers who seek a creative manual experience, despite its lack of electronic contacts. The 420-800mm focal length enables extensive reach, but the manual focus may be challenging for beginners.
Price Comparison
When it comes to pricing, the Canon RF 75-300mm f/4-5.6 Lens is significantly more expensive at $253.95 compared to the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens, which retails for $67.99. This makes the 420-800mm lens about 73% cheaper than its counterpart.
The substantial price difference may influence buyers, especially those on a budget or those who may not need the versatility of the RF lens. However, the higher price of the RF lens is justified by its advanced optical design and autofocus capabilities, which can enhance the overall shooting experience.
Autofocus and Usability
The Canon RF 75-300mm f/4-5.6 Lens features a DC motor-driven autofocus system, delivering accurate and responsive focusing performance for both stills and video. This capability makes it a user-friendly option, especially for photographers who require quick adjustments while shooting.
In contrast, the EF/EF-S 420-800mm F8.3 lens operates entirely in manual mode, which requires users to adjust focus manually. While this design allows for greater creative freedom and control, it may pose a challenge for less experienced photographers. Those who are comfortable with manual adjustments may appreciate the learning opportunity this lens provides.
Image Quality and Performance
The Canon RF 75-300mm f/4-5.6 Lens is optimized for sharpness and clarity across its zoom range, thanks to its advanced optical design and Canon's Super Spectra Coating. This coating minimizes lens flare and ghosting while enhancing contrast and color fidelity, ensuring high-quality images even in challenging lighting conditions.
On the other hand, the EF/EF-S 420-800mm F8.3 lens is designed for sharp images, yet it lacks the advanced optical coatings found in higher-end lenses. Although it can produce impressive background bokeh and sharpness, users might find that they must work harder to achieve similar results, given its fully manual operation.
Portability and Convenience
The Canon RF 75-300mm f/4-5.6 Lens is designed with portability in mind. Weighing just over 1 lb, it is easy to carry for long periods, making it a great option for travel and outdoor photography. The compact design does not compromise image quality, allowing photographers to take it on various assignments without feeling burdened.
In contrast, the EF/EF-S 420-800mm F8.3 lens is larger and may be less convenient for long outings. While it offers a more extensive focal range, the trade-off in weight and size could affect the overall shooting experience, particularly for those who prioritize mobility.
Compatibility with Camera Systems
The Canon RF 75-300mm f/4-5.6 Lens is specifically tailored for Canon RF-mount cameras, ensuring optimal performance and integration with the latest mirrorless systems. This compatibility allows users to take full advantage of advanced features and enhancements available in RF-mount bodies.
The EF/EF-S 420-800mm F8.3 lens, however, is compatible with a wider range of Canon DSLR cameras, including various models from the Rebel series to the 5D Mark IV. This makes it an appealing option for photographers who own older Canon DSLR systems but may limit those who have transitioned to mirrorless.
Which should you buy?
If you are looking for a lens that offers versatility, portability, and autofocus capabilities, the Canon RF 75-300mm f/4-5.6 Lens is the superior choice, although it comes at a higher price of $253.95. Its optimized optical design and lightweight build make it ideal for a variety of photography styles.
However, if you are on a budget and are comfortable with manual focusing, the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens priced at $67.99 provides an extended focal range and is significantly cheaper. Ultimately, your decision should hinge on your specific needs, shooting style, and whether you prefer the ease of autofocus over the manual control of a more extended reach.

