Yongnuo 50mm f/1.8S DA Lens — Specs, Reviews, Used Prices

Yongnuo YN 50mm f/1.8S DA DSM II Lens

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Lens Overview — Yongnuo 50mm f/1.8S DA

The Yongnuo YN 50mm f/1.8S DA DSM II is a prime standard lens built for APS-C mirrorless cameras using the Sony E mount. With a maximum aperture of f/1.8, it offers strong light-gathering capability that opens up shooting possibilities in a wide range of lighting conditions. The lens supports both autofocus and manual focus operation, giving photographers flexibility depending on their shooting style or creative needs.

Weighing just 146g, it makes for a compact and lightweight pairing with Sony E-mount mirrorless bodies, reducing fatigue during extended shooting sessions. The 49mm filter thread size is a common and affordable standard, making it easy to add filters without breaking the budget. Classified as a standard focal length prime at 50mm, it suits a broad range of photographic subjects from portraits to street and everyday documentary work.

The APS-C format coverage matches well with crop-sensor Sony E-mount bodies. No image stabilization is present, which is worth factoring in when shooting in lower light or at slower shutter speeds. Overall, this lens positions itself as an accessible, lightweight prime option for Sony E-mount APS-C shooters who want a fast aperture in a compact package.

Key Features — Yongnuo 50mm f/1.8S DA

50mm f/1.8 Prime: A standard focal length with a wide maximum aperture, well-suited for portraits, street, and everyday photography on APS-C bodies.

Sony E Mount: Designed specifically for Sony E-mount mirrorless cameras, ensuring native compatibility with APS-C bodies like the ZV-E10, a6000 series, and beyond.

APS-C Format Coverage: Optimized image circle for crop-sensor Sony E-mount bodies, producing an effective field of view equivalent to roughly 75mm on full frame.

Autofocus Support: Built-in autofocus motor allows fast, hands-free focus acquisition for everyday and action shooting scenarios.

Manual Focus Option: Switches to manual focus for situations where precise control over focus point is preferred, such as close-up or creative work.

146g Lightweight Build: Compact and light enough to carry all day without adding meaningful bulk or fatigue to a mirrorless kit.

Lens Specifications — Yongnuo 50mm f/1.8S DA

Yongnuo 50mm f/1.8S DA full specifications
Spec	Detail
Use Cases	Travel, Studio
Lens Type	Prime
Format	APS-C
Zoom/Prime	Prime
Focal Length	50mm
Maximum Aperture	f/1.8
Camera System	Mirrorless
Lens Mount	Sony E
Autofocus	Yes
Focus Type	Auto, Manual
Image Stabilization	None
Filter Thread	49mm
Weight	146g

Description — Yongnuo 50mm f/1.8S DA

The Yongnuo YN 50mm f/1.8S DA DSM II is a 50mm prime lens designed for APS-C Sony E-mount mirrorless cameras. Its f/1.8 maximum aperture makes it well-suited for available-light photography and creative depth-of-field control. Tipping the scales at just 146g, this lens is easy to carry and pairs well with compact mirrorless bodies without adding significant bulk.

Both autofocus and manual focus are supported, providing flexibility across different shooting scenarios. The 49mm filter thread accepts a wide range of commonly available filters. With no image stabilization on board, steady technique or in-body stabilization becomes more important in challenging light.

Classified as a standard prime in the focalLengthRange category, this lens is a straightforward choice for Sony APS-C shooters looking for a fast, lightweight, fixed-focal-length option.

Pros — Yongnuo 50mm f/1.8S DA

✓Wide f/1.8 maximum aperture provides strong light-gathering performance
✓Lightweight at just 146g, ideal for travel and everyday carry
✓Supports both autofocus and manual focus for shooting flexibility
✓Sony E mount compatibility makes it broadly usable across APS-C mirrorless bodies
✓49mm filter thread is a common, affordable size for easy filter use

Cons — Yongnuo 50mm f/1.8S DA

✗No image stabilization, which can be a limitation in low-light or handheld shooting
✗APS-C format only — not suitable for full-frame Sony E-mount bodies
✗Fixed 50mm focal length offers no zoom flexibility
✗Filter thread size of 49mm, while affordable, is on the smaller side and may limit some filter options

Videos — Yongnuo 50mm f/1.8S DA

Yongnuo 50mm f/1.8 S DA DSM lens review - a budget option for Sony — Christopher Frost

Frequently Asked Questions — Yongnuo 50mm f/1.8S DA

Which cameras is this lens compatible with?+

The YN 50mm f/1.8S DA DSM II is designed for Sony E-mount mirrorless cameras with APS-C sensors. It uses the Sony E lens mount and is not intended for full-frame bodies.

Does this lens have image stabilization?+

No, the specifications confirm that image stabilization is listed as 'None.' Shooters who need stabilization will need to rely on in-body stabilization if their camera supports it.

Does this lens support autofocus?+

Yes, the lens supports both autofocus and manual focus. Autofocus is confirmed in the specifications, giving users the option to switch between modes as needed.

What filter size does this lens use?+

The lens has a 49mm filter thread, which is a widely available and affordable size, making it easy to find compatible filters from many manufacturers.

How heavy is this lens?+

The Yongnuo YN 50mm f/1.8S DA DSM II weighs 146g, making it a notably lightweight option for a fast-aperture prime lens.

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