YONGNUO YN50mm F1.8 Lens Large Aperture Auto Focus Lens Compatible with Canon EF Mount EOS Camera
Want the best price and purchase timing?
Our AI advisor analyzes real-time pricing across all channels to find you the best deal.
AI Verdict
This 4.2-ounce, F1.8 standard lens offers a wide aperture for Canon EF mount cameras, best for still subjects on a tight budget.
This lens is a situational fit because its F1.8 aperture and low 4.2-ounce weight are appealing for creating shallow depth of field and portability. However, its slow, noisy autofocus and plastic build quality mean it's only suitable if you prioritize budget and aperture over speed and durability.
If autofocus speed and consistent sharpness are important, look for lenses with an STM (Stepping Motor) for quieter and faster focusing, and a metal lens mount for better durability.
Regret Score™
High RiskLower is better — measures purchase-regret risk from real buyer complaints, review credibility, and product maturity
Issues discovered after purchase
Critically weak dimension
Amazon rating vs actual quality
Chance this product isn't for you
Pros
- F1.8 large aperture creates virtual backgrounds, enhancing subject isolation.
- Weighs only 4.2 ounces, making it light to carry.
- Supports both auto focus and manual focus modes.
- Equipped with a focus distance indicator at 0.45 meters for precise shooting.
- Multi-coated lenses effectively improve light transmittance.
- Metal contacts are gold-plated, improving signal conductivity and corrosion resistance.
Cons
- Autofocus is slow, noisy, and struggles in low light, often hunting for focus.
- Build quality is all plastic, including the mount plate, feeling less durable than alternatives.
- Sharpness at F1.8 can be soft, requiring stopping down to F2.8 or F4 for better detail.
- Inconsistent autofocus performance, even with well-lit subjects, leading to out-of-focus images.
- Not compatible with most Canon film bodies and has issues with EOS M series in Live View.
Dimension Scores
Sharpness at F1.8 is often soft, and while it improves when stopped down, chromatic aberrations and corner mushiness are present.
Autofocus is slow, noisy, struggles in low light, and can be inconsistent, often hunting for focus.
The noisy and slow autofocus, combined with potential compatibility issues on mirrorless bodies, makes it less suitable for video recording.
Weighing only 4.2 ounces, this lens is exceptionally light, making it easy to carry for extended periods.
Best For
- Beginner photographers needing a wide aperture for background blur on a budget.
- Shooting still subjects or portraits where autofocus speed is not critical.
- Casual photography for social media where minor optical imperfections are less noticeable.
- Photographers who primarily use manual focus and want a lightweight lens.
Not Recommended For
- Professional photographers requiring fast, consistent autofocus for events or moving subjects.
- Users of Canon film cameras or EOS M series cameras due to compatibility issues.
- Anyone needing robust build quality or a metal lens mount for durability.
Watch Out For
- Autofocus can be inconsistent, sometimes failing to achieve sharp focus even with good contrast.
- The lens firmware may not have the same lens/camera handshake as original Canon lenses, causing issues on some bodies.
- Users report 'Error 01' on EOS M2 cameras, losing autofocus and aperture control, requiring manual use.
- The plastic build includes a plastic mount plate, which some users find contributes to a cheap feel and potential for less longevity.
- Sharpness at F1.8 is often absent, with images appearing soft, and corners remaining mushy up to F4.
Full Specifications
| ASIN | B00QEXM4YC |
| Brand | YONGNUO |
| Batteries | 1 Lithium Ion batteries required. |
| Lens Type | Standard |
| Item Weight | 4.2 ounces |
| Manufacturer | YONGNUO |
| Item model number | YN50MM Canon |
| Product Dimensions | 3.27 x 3.15 x 3.27 inches |
| Compatible Mountings | Canon EF |
| Camera Lens Description | 50 millimetres |
| Focal Length Description | 50mm |
| Is Discontinued By Manufacturer | No |
What Buyers Say
Many users highlight the lens's ability to produce significant background blur at F1.8, making it a popular choice for portraiture on a budget. However, the autofocus system is a recurring point of frustration, described as slow, noisy, and prone to hunting, especially in dim lighting. The all-plastic construction, including the lens mount, contributes to a perception of cheapness, with some users reporting durability concerns after a few months of use. Sharpness wide open at F1.8 is frequently noted as soft, requiring photographers to stop down the aperture for clearer images.
“Look, for fifty bucks, I got that blurry background everyone raves about, but man, this thing hunts for focus like a blind squirrel, and it feels like it's gonna fall apart if I look at it wrong. Still, it's mine, and it takes pictures.”
Common Praise
- F1.8 aperture creates noticeable background blur for portraits.
- Very lightweight at 4.2 ounces, making it easy to carry.
- Produces sharp images when stopped down to F2.8 or F4.
- Good value for money if you need a wide aperture and are on a tight budget.
- Colors look natural in images.
Common Complaints
- Autofocus is slow, noisy, and struggles in low light.
- Build quality is entirely plastic, including the lens mount, feeling less robust.
- Sharpness at F1.8 is often soft, especially in the corners.
- Inconsistent autofocus performance, leading to missed shots.
- Compatibility issues with some older Canon film bodies and EOS M series cameras.
- Some users experienced the lens failing after a few months of use.
Ownership Tips
- The autofocus motor can be audibly loud during operation, which is noticeable in quiet environments.
- Manual focus ring can feel loose or have play, making precise manual focusing challenging.
- The lens can produce chromatic aberrations, especially at wider apertures, which may require post-processing correction.
- Vignetting is present at F1.8, but significantly improves by F2 and is almost gone by F4.
- Some users report the lens simply stops working or throws error codes after a period of use.
Frequently Asked Questions
Does this lens work with all Canon EF mount cameras?
It is compatible with Canon EF mount EOS cameras, including full-frame and APS-C formats. However, it may not work with most older Canon film bodies and can have issues with EOS M series cameras in Live View mode.
How is the autofocus performance?
The autofocus is generally slow and noisy. It struggles in low light and can be inconsistent, sometimes hunting for focus or producing soft images even in good conditions.
Is the build quality durable?
The lens features an all-plastic construction, including the lens mount. Users describe it as feeling lightweight and inexpensive, which is typical for its price point.
Can I get good background blur with this lens?
Yes, the F1.8 large aperture is a key feature for achieving significant background blur (bokeh), making subjects stand out.
How sharp are the images?
Sharpness at F1.8 can be soft, especially in the corners. Images generally become sharper when stopped down to F2.8 or F4, with F5.6 and F8 offering the best detail.
Buying Guide
When you're looking at a lens like this, you need to think about what you actually shoot. An F1.8 aperture means you can get that blurry background look, which is awesome for portraits or isolating subjects. But don't expect lightning-fast focus or super-sharp images straight out of the camera at its widest setting. You're trading some performance and build quality for that low price.
F1.8 Large Aperture
This number tells you how wide the lens can open. A smaller f-number like F1.8 lets in a lot of light, which is great for shooting in dim conditions without a flash. It also creates a very shallow depth of field, blurring out the background behind your subject, making them pop like a 3D image.
Auto Focus and Manual Focus
Autofocus (AF) means the camera focuses for you, which is convenient for quick shots. Manual focus (MF) means you turn a ring on the lens to focus yourself, giving you precise control, especially for still life or when AF struggles. This lens gives you both options, but the AF isn't its strong suit.
Weight: 4.2 ounces
This is how heavy the lens is. At 4.2 ounces, it's super light, like carrying a small apple. This matters if you're walking around all day with your camera or want a lens that won't add much bulk to your bag.
Alternatives
If you need faster, more reliable autofocus and better build quality, look for a 50mm F1.8 lens with a Stepping Motor (STM) and a metal lens mount. If you shoot with a mirrorless Canon EOS M camera, ensure the alternative lens is explicitly compatible with mirrorless systems and Live View.
You Might Also Like
NexiGo N660P Pro 4K Webcam with Distortion-Free Lens, 1080p 60 fps Autofocus USB Streaming Camera, 3DNR, Noise-Canceling Mics & Privacy Cover, Web Cam for Gaming/Live Streaming/PC/Mac/Switch 2, Pink
$50-$99This is a 4K CMOS webcam with 3DNR and dual noise-canceling mics, designed for plug-and-play use across multiple platforms.
NexiGo N660P Pro 4K Webcam with Distortion-Free Lens, 1080p 60 fps Autofocus USB Streaming Camera, 3DNR, Noise-Canceling Mics & Privacy Cover, Web Cam for Gaming/Live Streaming/PC/Mac/Switch 2, Black
$50-$99This is a 4K 30fps or 1080p 60fps webcam with autofocus, dual noise-canceling mics, and a privacy cover, designed for streaming and video calls on various platforms.
NexiGo N660P Pro 4K Webcam with Distortion-Free Lens, 1080p 60 fps Autofocus USB Streaming Camera, 3DNR, Noise-Canceling Mics & Privacy Cover, Web Cam for Gaming/Live Streaming/PC/Mac/Switch 2, White
$50-$99This 4K webcam with 1080p 60 fps streaming, autofocus, and dual noise-canceling mics is for users needing high resolution and smooth video without external software.
4K Webcam with Autofocus & Tripod, Camera for PC Laptop with Dual Microphone, USB Computer Camera with Low Light Correction, Auto White Balance, Video Camera for Streaming, Meetings, Office, Zoom
$0-$49A 4K webcam with a CMOS sensor and f/2.8 aperture, designed for basic video calls and streaming on a budget.