OM SYSTEM Olympus M.Zuiko Digital 40- vs YONGNUO YN50mm F1.8 Lens Large Aperture Auto Focus
Updated July 2026 — OM SYSTEM Olympus M.Zuiko Digital 40- wins on weight and length, YONGNUO YN50mm F1.8 Lens Large Aperture Auto Focus wins on focus.
The OM SYSTEM lens offers versatility and advanced features, while the YONGNUO lens is a budget-friendly option with excellent low-light performance.
Why OM SYSTEM Olympus M.Zuiko Digital 40- is better
Zoom Range
OM SYSTEM has a versatile 40-150mm zoom.
Autofocus
OM SYSTEM features High-Speed Imager AF.
Build Quality
OM SYSTEM has a stylish and portable design.
Why YONGNUO YN50mm F1.8 Lens Large Aperture Auto Focus is better
Price
YONGNUO is significantly cheaper.
Aperture
YONGNUO has a large F1.8 aperture.
Weight
YONGNUO is lighter and more compact.
Overall score
Specifications
| Spec | OM SYSTEM Olympus M.Zuiko Digital 40- | YONGNUO YN50mm F1.8 Lens Large Aperture Auto Focus |
|---|---|---|
| Focal Length | 40-150mm | 50mm |
| Max Aperture | F4.0-5.6 | F1.8 |
| Autofocus | Yes (MSC) | Yes |
| Compatibility | Micro Four Thirds | Canon EF |
| Price | $175.99 | $82.00 |
Dimension comparison
Overview of the Products
The OM SYSTEM Olympus M.Zuiko Digital 40-150mm F4.0-5.6 R Silver lens and the YONGNUO YN50mm F1.8 lens cater to different photography needs with distinct features and price points. Priced at $175.99, the Olympus lens offers a versatile zoom range ideal for various shooting scenarios, while the YONGNUO lens, available for $82.00, focuses on delivering large aperture capabilities for creative photography. This price difference makes the YONGNUO lens about 53% cheaper than the OM SYSTEM lens, appealing to budget-conscious photographers.
Focal Length and Versatility
The OM SYSTEM Olympus lens boasts a focal length of 40-150mm, providing a 3.75x zoom range that is excellent for capturing subjects from a distance, making it versatile for both portraits and landscapes. In contrast, the YONGNUO lens has a fixed focal length of 50mm, which is particularly suited for portrait photography but lacks the flexibility of a zoom lens. Therefore, if you require versatility in your photography, the OM SYSTEM lens is a better option, whereas the YONGNUO is ideal for those who prefer the aesthetic qualities of a prime lens.
Aperture and Low-Light Performance
The YONGNUO lens features a large maximum aperture of F1.8, which allows for excellent low-light performance and a shallow depth of field, enabling photographers to create beautiful background blur. On the other hand, the OM SYSTEM lens has a maximum aperture range of F4.0-F5.6, which is less effective in low-light conditions. This means that for shooting in dimly lit environments or achieving a dreamy bokeh effect, the YONGNUO lens is superior. However, the Olympus lens's aperture is still adequate for general shooting in well-lit conditions.
Autofocus Capabilities
Both lenses offer autofocus capabilities, but the OM SYSTEM lens features High-Speed Imager AF (MSC), which enhances its focusing speed and precision. The YONGNUO lens also supports auto focus and manual focus modes, giving photographers more control over their shots. However, the lack of specific autofocus technology details for the YONGNUO lens may suggest it is not as advanced as the OM SYSTEM lens in this regard. For photographers who prioritize quick and accurate autofocus, the OM SYSTEM lens may be the preferred choice.
Build Quality and Design
The OM SYSTEM Olympus lens presents a portable design, making it convenient for travel and outdoor photography. Its silver finish adds a stylish touch, which may appeal to photographers who appreciate aesthetics. In contrast, the YONGNUO lens is designed for compatibility with Canon EF mount cameras, featuring a practical structure with a focus distance indicator at 0.45 meters. While both lenses are well-constructed, the OM SYSTEM lens may have an edge in design elegance, whereas the YONGNUO lens focuses more on functionality.
Price and Value for Money
At a price of $175.99, the OM SYSTEM lens is a premium product that reflects its advanced features and versatility. In comparison, the YONGNUO lens is priced at $82.00, making it a more budget-friendly option. This price difference of $93.99 signifies that the YONGNUO lens is more than half the price of the OM SYSTEM lens. For photographers who are just starting or those on a tight budget, the YONGNUO lens represents a strong value for money while still offering essential features.
Target Audience
The OM SYSTEM Olympus lens appeals to a broad range of photographers, including enthusiasts and professionals who seek versatility and quality in their gear. Its zoom capabilities make it suitable for various photography styles, from wildlife to event photography. On the other hand, the YONGNUO lens is targeted at those who focus primarily on portrait photography and prefer the creative control that a large aperture provides. Thus, the choice between the two lenses ultimately depends on the photographer's specific needs and style.
Which should you buy?
In conclusion, choosing between the OM SYSTEM Olympus M.Zuiko Digital 40-150mm lens and the YONGNUO YN50mm F1.8 lens depends on your photography requirements. If you prioritize versatility, zoom capability, and advanced autofocus technology, the OM SYSTEM lens may be worth the investment. However, if you are looking for an affordable lens that excels in low-light conditions and offers creative portrait capabilities, the YONGNUO lens is an excellent choice.

