Canon EF vs lightdow EF/EF-S 420-
Updated July 2026 — Canon EF wins on price and focus type, lightdow EF/EF-S 420- wins on focal length and weight.
The Canon EF 50mm f/1.8 STM Lens excels in low-light performance and ease of use, while the EF/EF-S 420-800mm offers budget-friendly telephoto capabilities. Choose based on your specific needs.
Why Canon EF is better
Low-light Performance
f/1.8 maximum aperture is ideal for low-light photography
Autofocus
Near-silent autofocus system enhances usability
Build Quality
Compact and lightweight design for portability
Why lightdow EF/EF-S 420- is better
Price
Significantly cheaper at $65.69
Telephoto Range
Focal length of 420-800mm for distant subjects
Manual Focus
Encourages skill development in photography
Overall score
Specifications
| Spec | Canon EF | lightdow EF/EF-S 420- |
|---|---|---|
| Max Aperture | f/1.8 | f/8.3 |
| Focal Length | 50mm | 420-800mm |
| Autofocus | Yes | No |
| Weight | 130g | 800g |
| Build Quality | High | Moderate |
Dimension comparison
Overview of the Canon EF 50mm f/1.8 STM Lens
The Canon EF 50mm f/1.8 STM Lens is priced at $155.99, making it a mid-range option for photographers looking for a prime lens. This lens is particularly well-suited for portrait, action, and low-light photography, given its bright f/1.8 maximum aperture. The unique Super Spectra coating on individual elements helps in reducing flare and ghosting, ensuring better contrast and color accuracy. Its compact design and lightweight nature cater to those who prefer portability without sacrificing performance.
Overview of the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens
In stark contrast, the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens is significantly more budget-friendly at $65.69, around 58% cheaper than the Canon EF 50mm lens. This lens is designed for those who need a telephoto capability, allowing for a focal length range of 420-800mm, making it ideal for wildlife, sports, and distant landscapes. However, it features a fully manual focus design, which may not be suitable for everyone but offers photographers the chance to hone their skills and creativity through precise manual adjustments.
Build Quality and Design
The Canon EF 50mm f/1.8 STM Lens boasts a compact and lightweight design, which is optimal for everyday shooting. The lens is built with a stepping motor (STM) that provides near-silent autofocus, making it an excellent choice for video recording as well. On the other hand, the EF/EF-S 420-800mm Telephoto Zoom Lens is designed with a fully manual focus mechanism, which means that it does not have electronic contacts for automatic focusing. This design can be seen as a drawback for some, but it offers a professional manual focus experience for those willing to invest the time in mastering the technique.
Compatibility with Camera Bodies
The Canon EF 50mm f/1.8 STM Lens is compatible with a variety of Canon camera bodies, including both full-frame and APS-C formats. This versatility allows users to maximize their investment across different camera systems. Conversely, the EF/EF-S 420-800mm Telephoto Zoom Lens is specifically designed to work with a wide range of Canon EOS models, including the Rebel series and more advanced models like the 90D and 5D Mark IV. This broad compatibility makes it a flexible option for users with various Canon cameras.
Optical Performance
The optical performance of the Canon EF 50mm f/1.8 STM Lens is a significant highlight, thanks to its large maximum aperture of f/1.8, which excels in low-light situations and provides excellent depth of field control. Its lens elements are coated with Super Spectra technology to minimize flare and ghosting, ensuring that images are sharp and vibrant. In contrast, the EF/EF-S 420-800mm Telephoto Zoom Lens has an aperture range of f/8.3 to f/16, which is less favorable for low-light conditions. However, its long focal length allows for detailed captures of distant subjects, making it ideal for specific photographic scenarios.
User Experience and Focus Mechanism
For those looking for ease of use, the Canon EF 50mm f/1.8 STM Lens features a smooth autofocus system that is especially beneficial for beginners or those who prefer a more straightforward shooting experience. The lens allows for full-time manual focus override, giving users the flexibility to make adjustments as needed. On the contrary, the EF/EF-S 420-800mm Telephoto Zoom Lens requires full manual focus without electronic assistance, which can be a learning curve for new photographers. However, this manual focus can also enhance a photographer's skills, allowing for greater control over the image-making process.
Price Point and Value for Money
At $155.99, the Canon EF 50mm f/1.8 STM Lens is a solid investment for those who need a reliable prime lens for various photography styles. Its features justify the price, especially for portrait and low-light photography. Meanwhile, the EF/EF-S 420-800mm Telephoto Zoom Lens, at $65.69, represents remarkable value for those who want a telephoto lens without a hefty price tag. Despite being a manual focus lens, its capability to capture distant subjects at a budget-friendly price makes it an appealing choice for budding photographers.
Which should you buy?
Choosing between the Canon EF 50mm f/1.8 STM Lens and the EF/EF-S 420-800mm F8.3 Telephoto Zoom Lens largely depends on your photographic needs and preferences. If you prioritize low-light performance, ease of use, and versatility, the Canon EF 50mm lens is worth the investment at $155.99. However, if you are looking for a budget-friendly option that offers long-range capabilities and are willing to embrace the manual focus experience, the EF/EF-S 420-800mm lens at $65.69 could be the better choice. Ultimately, each lens serves a different purpose, and your decision should align with your specific photography goals.

