Sigma vs YNLENS YONGNUO YN50mm
Updated July 2026 — Sigma wins on build and optics, YNLENS YONGNUO YN50mm wins on price and weight.
The Sigma 30mm F1.4 offers superior optical performance and build quality, while the YONGNUO YN50mm is a budget-friendly option with essential features.
Why Sigma is better
Optical Quality
Sigma has a wider aperture for better low-light performance.
Build Quality
Sigma is crafted in Japan with a robust design.
Autofocus
Sigma features a fast and accurate stepping motor.
Why YNLENS YONGNUO YN50mm is better
Price
YONGNUO is significantly cheaper.
Weight
YONGNUO is lighter at 203 grams.
Compatibility
YONGNUO supports a wider range of Nikon DSLRs.
Overall score
Specifications
| Spec | Sigma | YNLENS YONGNUO YN50mm |
|---|---|---|
| Aperture | F1.4 | F1.8 |
| Focal Length | 30mm | 50mm |
| Mount Type | Sony E | Nikon F |
| Blade Count | 9 | 7 |
| Autofocus | Stepping Motor | Manual/Auto |
Dimension comparison
Overview of the Sigma 30mm F1.4 and YONGNUO YN50mm 50mm F1.8
The Sigma 30mm F1.4 Contemporary DC DN Lens for Sony E is priced at $419.00, while the YONGNUO YN50mm 50mm f/1.8 Lens for Nikon F-Mount is significantly cheaper at $102.00, making it about 76% less expensive. Both lenses cater to different user needs, with the Sigma designed for Sony E-mount cameras and the YONGNUO tailored for Nikon F-mount systems. This price difference reflects the varying performance and features of both products, appealing to different types of photographers.
Build Quality and Design
The Sigma 30mm F1.4 features a compact design with a small size ideal for portability, making it perfect for photographers on the go. It includes a robust construction and comes with a lens hood and caps, enhancing its usability and protection. In contrast, the YONGNUO YN50mm boasts a lightweight construction at just 203 grams, incorporating a high-precision metal bayonet and gold-plated contacts, which contribute to its durability and reliability. While the Sigma is crafted in Japan and emphasizes high-quality optics, the YONGNUO offers a more budget-friendly design without compromising essential features.
Optical Performance
Sigma's 30mm F1.4 lens is positioned as a high-performance prime lens with a large aperture of F1.4, excelling in low-light conditions and providing beautiful depth of field. Its nine rounded aperture blades help achieve smooth bokeh, ideal for portrait photography. The YONGNUO YN50mm, on the other hand, features a 50mm focal length and a large aperture of F1.8, which also allows for impressive low-light performance. With a 7-blade circular aperture, it produces a creamy background blur and is especially suited for portraiture. Both lenses deliver excellent optical quality, but the Sigma has a slight edge in low-light versatility due to its wider aperture.
Autofocus Capabilities
The Sigma lens incorporates a stepping motor that enables fast and accurate autofocus, making it a suitable choice for both photography and video work. This feature is particularly beneficial for capturing dynamic scenes or during video shoots, where precise focus is crucial. Conversely, the YONGNUO YN50mm lens offers an automatic/manual switching system that enhances user control over focus, which is valuable for those who prefer a hands-on approach. However, it does not specifically mention the speed or precision of its autofocus capabilities, potentially making the Sigma a better choice for users needing quick and reliable focus.
Compatibility and Versatility
The Sigma 30mm is designed for APS-C mirrorless cameras, specifically compatible with various Sony E-mount models, including popular options like the a6000 series. This lens is versatile enough for a range of photography styles, from street photography to portraiture. In contrast, the YONGNUO YN50mm is compatible with a wide array of Nikon F-mount DSLRs, such as the D3000 and D5000 series. This broader compatibility opens the YONGNUO lens to a larger audience of Nikon users, but it is primarily designed for full-frame cameras, which may not suit users of crop sensor models as effectively.
User Experience and Features
The Sigma lens is renowned for its image quality and compact design, making it an excellent choice for those who prioritize performance in a portable package. It also includes a lens hood, which helps reduce flare and improve contrast in bright conditions. The YONGNUO YN50mm, while more affordable, focuses on essential features like face and eye recognition capabilities, appealing to photographers interested in portraiture or events where capturing expressions is vital. The YONGNUO's specifications indicate a user-friendly experience, but it may lack some of the advanced features found in the Sigma lens.
Price and Value Comparison
With a current price of $419.00 for the Sigma and $102.00 for the YONGNUO, the Sigma is about 317% more expensive than the YONGNUO. This substantial price gap reflects not only the Sigma’s advanced features but also its premium build quality and performance. While the Sigma lens offers superior optical quality and low-light performance, the YONGNUO provides great value for beginners or casual photographers who may not need the extensive capabilities of a higher-end lens. Ultimately, the decision may come down to budget constraints and specific photographic needs.
Which should you buy?
Choosing between the Sigma 30mm F1.4 and the YONGNUO YN50mm 50mm f/1.8 ultimately depends on your camera system and what you prioritize in a lens. If you are a Sony E-mount user seeking exceptional optical performance and advanced features, the Sigma is a worthwhile investment. However, if you're on a budget and own a Nikon F-mount camera, the YONGNUO offers excellent value without compromising on essential features. Each lens has its strengths, catering to different user preferences and photography styles.

