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Canon EF 75- vs lightdow EF/EF-S 420-

Updated July 2026 — Canon EF 75- wins on weight, lightdow EF/EF-S 420- wins on focal length and closest focus.

The Canon EF 75-300mm lens offers better autofocus and usability, while the EF/EF-S 420-800mm lens provides greater zoom at a lower price but requires manual focus.

Why Canon EF 75- is better

Autofocus

Canon lens features autofocus for ease of use.

Brand Reputation

Canon is a well-respected brand in photography.

Aperture

Canon lens has a better maximum aperture for low light.

Why lightdow EF/EF-S 420- is better

Price

EF/EF-S lens is significantly cheaper.

Focal Length

EF/EF-S lens offers a longer focal length range.

Manual Focus

Allows for creative control in photography.

Overall score

Canon EF 75-
85
lightdow EF/EF-S 420-
70

Specifications

SpecCanon EF 75-lightdow EF/EF-S 420-
AutofocusYesNo
Warranty1 YearNone
CompatibilityCanon SLREF/EF-S
Zoom TypeRotatingManual
Image StabilizationNoNo

Dimension comparison

Canon EF 75-lightdow EF/EF-S 420-

Overview of the Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens

The Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens is priced at $199.99, making it a solid option for photographers seeking versatility in focal length. This lens features a maximum aperture of f/4-5.6 and is designed for Canon SLR cameras, providing a wide range of capabilities from sports to portrait photography. Weighing in at 16.8 ounces and measuring 4.8 inches in length, this lens is relatively lightweight and easy to handle, making it suitable for various shooting scenarios.

In contrast, the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens is significantly cheaper at $65.69. While it offers a much greater focal length range, it operates solely on manual focus, which may not appeal to all photographers. The choice between these two lenses ultimately hinges on whether you prefer the convenience of autofocus or are comfortable with manual adjustments.

Focal Length Comparison

The Canon EF 75-300mm lens provides a focal length range of 75-300mm, suitable for a variety of photography styles, including wildlife, portraits, and sports. This versatility allows photographers to capture subjects from a comfortable distance, making it a well-rounded choice for many settings.

On the other hand, the EF/EF-S 420-800mm lens boasts a much longer focal length range of 420-800mm, allowing you to get incredibly close to distant subjects. This lens excels in capturing detailed images of wildlife and other far-off subjects, making it ideal for specialized photography. However, this extended range also comes with the challenge of requiring a fully manual focus, which could be a drawback for those who prefer the ease of autofocus.

Aperture and Light Gathering

The Canon EF 75-300mm lens features a maximum aperture of f/4-5.6, allowing for decent light gathering capabilities. This aperture range is sufficient for most daylight shooting scenarios and can handle moderate low-light conditions reasonably well.

In contrast, the EF/EF-S 420-800mm lens has a maximum aperture of f/8.3 at 420mm, which narrows to f/16 at its maximum focal length of 800mm. This reduced light-gathering capability can limit shooting options, particularly in low-light situations, making the Canon lens a better choice for those who frequently shoot in varying lighting conditions.

Build Quality and Design

The Canon EF 75-300mm lens is built with a focus on usability and comfort, weighing 16.8 ounces and featuring an improved zoom mechanism that allows for smoother operation. The lens’s 58mm filter size offers versatility in terms of additional accessories, enhancing its functionality.

In contrast, the EF/EF-S 420-800mm lens, while also compatible with a variety of Canon camera bodies, is designed for manual focus, which means it lacks some of the modern conveniences found in autofocus lenses. This lens emphasizes a more traditional photography experience, allowing photographers to engage deeply with their craft, but it may result in a steeper learning curve for those used to automatic settings.

Intended Usage and Flexibility

The Canon EF 75-300mm lens is well-suited for a range of applications, from capturing fast-paced sports to intimate portraits. Its 4.9-foot closest focusing distance adds to its versatility, allowing for detailed close-ups, especially at 300mm.

Conversely, the EF/EF-S 420-800mm lens excels in capturing far-off subjects, making it ideal for wildlife, landscapes, and even astrophotography. However, since it is strictly a manual focus lens, it requires more skill and patience, catering primarily to those who are willing to invest time in refining their focus techniques.

Price Comparison

The Canon EF 75-300mm lens comes at a price of $199.99. Although this might seem steep compared to the EF/EF-S 420-800mm lens, which is priced at $65.69—about 67% cheaper—the differences in functionality and intended use justify the price disparity.

While the cheaper lens offers greater focal lengths, it does not feature autofocus and may require more effort to achieve the desired results. For photographers who prioritize ease of use and versatility, the Canon lens might be worth the investment despite its higher price point.

Brand Reputation and Support

Canon is a well-respected brand in the photography industry, known for producing high-quality lenses and cameras. The Canon EF 75-300mm lens comes with a one-year warranty, providing users with a degree of reassurance regarding their purchase.

On the other hand, the EF/EF-S 420-800mm lens is produced by Lightdow, which is less recognized in the photography community. While it offers unique features tailored for manual focus, it may not carry the same level of brand trust as Canon. This could impact resale value and customer support experiences.

Which should you buy?

Choosing between the Canon EF 75-300mm f/4-5.6 III Telephoto Zoom Lens and the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens ultimately depends on your specific photography needs. If you seek versatility, autofocus convenience, and a reliable brand reputation, the Canon lens is a solid choice despite its higher price. However, if you are looking for a budget-friendly option that allows for significant zoom capabilities and are comfortable with manual focus, the EF/EF-S 420-800mm lens may suit your needs well. Each lens has its strengths, so your choice will reflect your particular style and requirements as a photographer.