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lightdow EF/EF-S 420- vs Viltrox

Updated July 2026 — lightdow EF/EF-S 420- wins on weight and focal length, Viltrox wins on price and focus type.

The Lightdow lens is a budget-friendly option for Canon users, while the Viltrox excels in low-light performance and autofocus for Sony users.

Why lightdow EF/EF-S 420- is better

Price

The Lightdow lens is significantly cheaper at $65.69.

Telephoto Range

Offers a long focal length of 420-800mm.

Manual Focus

Provides full manual control for dedicated photographers.

Why Viltrox is better

Low-Light Performance

Bright f/1.7 aperture allows for better low-light shooting.

Autofocus

Features autofocus for convenience in fast-paced environments.

Weight

Lightweight design at 170g makes it ideal for travel.

Overall score

lightdow EF/EF-S 420-
65
Viltrox
85

Specifications

Speclightdow EF/EF-S 420-Viltrox
BrandlightdowVILTROX
Max Aperturef/8.3f/1.7
Focus TypeManualAuto
Camera TypeCanon DSLRSony Mirrorless
WeightN/A170g
Focal Length420-800mm35mm

Dimension comparison

lightdow EF/EF-S 420-Viltrox

Overview of the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens

The EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens offers an extensive focal range, while the Viltrox 35mm F1.7 E focuses on versatility and low-light performance. Priced at $65.69, the EF/EF-S lens is significantly cheaper than the Viltrox, which retails for $179.00. This makes the Lightdow lens about 63% less expensive, appealing to photographers on a budget who need a long-range option.

The Lightdow lens caters to Canon DSLR users, while the Viltrox is designed for Sony mirrorless cameras, showcasing two different approaches to photography needs.

Build Quality and Design

The EF/EF-S 420-800mm lens is a fully manual focus lens, which might appeal to photographers who prefer hands-on control over their settings. This design emphasizes stability and durability, allowing for precise focus adjustments. In contrast, the Viltrox 35mm F1.7 E is lightweight, weighing only 170g, making it ideal for travel and everyday use.

While the Lightdow lens is more robust due to its telephoto capabilities, the Viltrox’s design prioritizes portability and ease of use, particularly in dynamic shooting environments. This fundamental difference in build reflects the distinct user preferences for either long-range or compact photography gear.

Focal Length and Versatility

The EF/EF-S 420-800mm lens offers an impressive telephoto range, making it ideal for capturing distant subjects like wildlife and landscapes. Its long focal length is perfect for photographers looking to photograph distant objects up close. Conversely, the Viltrox 35mm F1.7 E is a prime lens with a focal length equivalent to 35mm on APS-C sensors, suited for portrait, landscape, and street photography.

The versatility of the Viltrox allows it to excel in various shooting scenarios, making it a more adaptable choice for casual and professional photographers requiring a lens for different types of photography. However, the specialized use of the Lightdow lens for telephoto shots cannot be overlooked, especially for those focused on certain genres.

Low-Light Performance

When it comes to low-light shooting, the Viltrox 35mm F1.7 E stands out with its bright f/1.7 maximum aperture. This feature provides better performance in dim conditions and offers greater control over depth of field. The EF/EF-S lens, with a maximum aperture of f/8.3 at 420mm and f/16 at 800mm, is less capable in low-light situations.

For photographers who often find themselves shooting in challenging lighting conditions, the Viltrox lens is the superior choice, allowing for more creative freedom and flexibility. The Lightdow lens may be less suitable for such environments, as its performance diminishes significantly without ample light.

Autofocus vs. Manual Focus

The Viltrox 35mm F1.7 E features auto-focus capabilities, providing a modern convenience that many photographers prefer, especially in fast-paced environments. In contrast, the EF/EF-S 420-800mm lens requires complete manual focus, which can be a learning curve for some users but allows for meticulous control over focus settings.

This distinction makes the Viltrox a better fit for those who value efficiency and speed, while the Lightdow lens may appeal to dedicated photographers looking to hone their manual focusing skills. Each design philosophy serves different types of users, setting the two lenses apart in this critical area.

Compatibility

The EF/EF-S 420-800mm lens is designed for a wide range of Canon DSLR cameras, including models like the EOS Rebel series and 5D Mark IV. This broad compatibility makes it a valuable addition for photographers already invested in Canon systems. On the other hand, the Viltrox 35mm F1.7 E is specifically tailored for Sony E-mount mirrorless cameras, including popular models like the a6600 and a7 series.

If you own Canon equipment, the Lightdow lens offers extensive compatibility for various camera bodies. Alternatively, the Viltrox is uniquely suited for Sony users, indicating the importance of brand and system allegiance when selecting a lens.

Price Comparison

The price difference between the two lenses is quite significant, with the EF/EF-S 420-800mm lens priced at $65.69, compared to the Viltrox 35mm F1.7 E at $179.00. This makes the Viltrox lens about 172% more expensive than the Lightdow lens.

For budget-conscious photographers or those just starting out, the Lightdow lens presents an attractive option without compromising on essential features. In contrast, the Viltrox lens may justify its higher cost through its advanced features and performance capabilities, targeting a different segment of the market.

Which should you buy?

Choosing between the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens and the Viltrox 35mm F1.7 E ultimately depends on your specific photography needs and camera system. If you're a Canon user seeking a budget-friendly telephoto option with a long focal length, the Lightdow lens is an excellent choice at $65.69. However, if you own a Sony camera and prioritize low-light performance and autofocus capabilities, the Viltrox lens, priced at $179.00, becomes the clear option. Your decision should align with your photographic style and system compatibility.