lightdow EF/EF-S 420- vs OM SYSTEM Olympus M.Zuiko Digital 40-
Updated July 2026 — lightdow EF/EF-S 420- wins on price and weight, OM SYSTEM Olympus M.Zuiko Digital 40- wins on focus and size.
The EF/EF-S 420-800mm lens offers extensive reach and affordability, while the Olympus lens provides better low-light performance and autofocus. Choose based on your specific needs.
Why lightdow EF/EF-S 420- is better
Price
The EF/EF-S lens is significantly cheaper at $65.69.
Focal Length
The EF/EF-S lens offers a longer focal length of 420-800mm.
Manual Focus
The EF/EF-S lens provides a fully manual focus experience.
Why OM SYSTEM Olympus M.Zuiko Digital 40- is better
Aperture
The Olympus lens has a maximum aperture of F4.0-5.6.
Autofocus
The Olympus lens features High-Speed Imager AF.
Portability
The Olympus lens is more compact and lightweight.
Overall score
Specifications
| Spec | lightdow EF/EF-S 420- | OM SYSTEM Olympus M.Zuiko Digital 40- |
|---|---|---|
| Focal Length | 420-800mm | 40-150mm |
| Max Aperture | F8.3-16 | F4.0-5.6 |
| Focus Type | Manual | Autofocus |
| Compatibility | Canon EF/EF-S | Micro Four Thirds |
| Zoom Ratio | 1.9x | 3.75x |
Dimension comparison
Overview of the Lenses
When comparing the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens and the OM SYSTEM Olympus M.Zuiko Digital 40-150mm F4.0-5.6 R, it’s clear that both lenses cater to different photography needs and preferences. The Lightdow lens is a manual focus telephoto option, perfect for capturing distant subjects, while the Olympus lens offers a more compact and versatile zoom range suited for general photography.
The EF/EF-S lens is priced at $65.69, making it approximately 63% cheaper than the OM SYSTEM lens, which retails at $175.99. This significant price difference will influence budget-conscious photographers, particularly those beginning their journey into telephoto photography.
Design and Build Quality
In terms of design, the EF/EF-S 420-800mm lens features a fully manual focus, providing photographers with precise control over their settings. The large focus ring and internal focus mechanism ensure stability and ease of use, though it necessitates a learning curve for those unfamiliar with manual photography.
Conversely, the OM SYSTEM Olympus lens is designed for portability and ease of use with a maximum aperture of F4.0-5.6. This lens is likely to appeal to those seeking a lightweight option for everyday shooting. The silver finish adds an aesthetic touch, making it visually appealing for street or casual photography.
Focal Length and Zoom Capabilities
The focal length of these lenses highlights their differing capabilities. The EF/EF-S lens offers an impressive range of 420-800mm, making it an excellent choice for capturing wildlife, distant landscapes, or celestial bodies. This extensive zoom allows photographers to get up close to their subjects without disturbing them.
In comparison, the Olympus lens has a more modest zoom range of 40-150mm, which is versatile but limited for extreme telephoto work. It is suitable for portraits, close-ups, and general photography, but it cannot match the reach of the Lightdow lens. This makes the EF/EF-S lens better suited for specialized photography while the Olympus lens fulfills more casual needs.
Aperture and Low-Light Performance
Aperture is a crucial factor in determining a lens's performance in low-light situations. The EF/EF-S 420-800mm lens has an aperture range of F8.3 at 420mm and F16 at 800mm, a limitation for low-light photography which can hinder its usability in dim environments.
On the other hand, the OM SYSTEM Olympus lens offers a maximum aperture of F4.0-5.6, allowing for better light collection and faster shutter speeds in lower light conditions. This makes the Olympus lens a more versatile option for various lighting situations, particularly for indoor or evening events where sufficient light may be scarce.
Autofocus vs. Manual Focus
The focus mechanism is another differentiating factor. The EF/EF-S 420-800mm lens is entirely manual focus, which may be daunting for beginners but rewarding for those who appreciate the control it offers. Photographers can experiment with settings and develop their skills while using this lens.
In contrast, the OM SYSTEM Olympus lens features High-Speed Imager AF (MSC), which allows for quick and efficient autofocus. This capability is ideal for capturing fast-moving subjects or fleeting moments without the need for manual adjustments, making it a user-friendly option for photographers of all skill levels.
Compatibility and Versatility
Compatibility is an essential consideration when selecting a lens. The EF/EF-S 420-800mm lens is designed specifically for Canon EOS cameras, supporting a wide range of models, including the Rebel series and 5D Mark IV. This extensive compatibility makes it a great addition for Canon users looking for a dedicated telephoto lens.
The OM SYSTEM Olympus lens is compatible with Micro Four Thirds cameras from Olympus and Panasonic. This narrower compatibility may limit its appeal to users who do not own compatible camera systems. However, for those within the Micro Four Thirds ecosystem, it offers a versatile zoom range and lightweight design.
Price Comparison
When it comes to pricing, the EF/EF-S 420-800mm lens is significantly more affordable at $65.69 compared to the OM SYSTEM Olympus lens, which costs $175.99. This difference of about $110.30 could be a decisive factor for budget-conscious photographers who may prioritize cost over advanced features.
The lower price of the Lightdow lens does not compromise its capabilities for those specifically looking for a manual focus telephoto option. For those who are new to photography or on a tighter budget, the EF/EF-S lens provides an accessible entry point into the world of telephoto photography.
Which should you buy?
Deciding between the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens and the OM SYSTEM Olympus M.Zuiko Digital 40-150mm F4.0-5.6 R largely depends on your photography needs and budget. If you are looking for an affordable telephoto lens with extensive reach and are comfortable with manual focus, the Lightdow lens is a solid choice at $65.69. However, if you prefer a more versatile, user-friendly option with autofocus capabilities and better low-light performance, the Olympus lens at $175.99 may be worth the investment. Ultimately, the choice hinges on whether you prioritize budget and reach or versatility and ease of use.

