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Yongnuo YN 25mm f/1.7 Prime Lens

The Yongnuo YN25mm f/1.7 is a 25mm f/1.7 lens designed for Micro Four Thirds mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

Yongnuo YN 25mm f/1.7 Prime Lens

Yongnuo YN 25mm f/1.7 Prime Lens

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Lens Overview — Yongnuo YN25mm f/1.7

The Yongnuo YN 25mm f/1.7 is a prime lens built for the Micro Four Thirds mirrorless system, offering a wide maximum aperture of f/1.7 in a compact, lightweight package. Weighing just 150g, this lens is designed to complement the portability that Micro Four Thirds shooters value, making it a practical option for everyday carry alongside a compact mirrorless body. The 25mm focal length sits in the standard range, making it a versatile choice across a broad range of shooting situations — from everyday street work to environmental portraits and available-light interiors.

The lens supports both autofocus and manual focus operation, giving shooters flexibility depending on the demands of a given scene. A 52mm filter thread provides compatibility with a wide range of commonly available filters. With no image stabilization on board, shooters will rely on their camera body's in-body stabilization if available, or use the f/1.7 aperture to help maintain faster shutter speeds in lower light.

Overall, this lens represents a budget-friendly option for Micro Four Thirds users seeking a fast standard prime without significant weight or size penalties.

Key Features — Yongnuo YN25mm f/1.7

25mm f/1.7 Aperture: The wide f/1.7 maximum aperture allows more light into the sensor, helping maintain usable shutter speeds in low-light environments.

Micro Four Thirds Mount: Natively designed for the MFT mirrorless system, ensuring full electronic compatibility with Panasonic and Olympus/OM System bodies.

50mm Full-Frame Equivalent: The 25mm focal length on a Micro Four Thirds sensor produces a classic 50mm field of view, well-suited for street, documentary, and portrait work.

Autofocus Support: Built-in autofocus motor enables convenient AF operation on compatible Micro Four Thirds mirrorless bodies without additional adapters.

Lightweight 150g Build: At just 150g, this lens adds minimal bulk to a mirrorless kit, making it practical for all-day carry.

52mm Filter Thread: The 52mm filter thread is a widely used size, making it straightforward to source compatible ND, UV, and polarizing filters.

Lens Specifications — Yongnuo YN25mm f/1.7

Yongnuo YN25mm f/1.7 full specifications
SpecDetail
Use CasesTravel
Lens TypeStandard
FormatMicro Four Thirds (MFT)
Zoom/PrimePrime
Focal Length25mm
Maximum Aperturef/1.7
Camera SystemMirrorless
Lens MountMicro Four Thirds
AutofocusYes
Focus TypeAuto, Manual
Image StabilizationNone
Filter Thread52mm

Description — Yongnuo YN25mm f/1.7

The Yongnuo YN 25mm f/1.7 is a prime lens built natively for the Micro Four Thirds mirrorless camera system. With a maximum aperture of f/1.7, it allows more light to reach the sensor, which is useful when working in challenging lighting environments or when a shallower depth of field is desired. At just 150g, it is a featherlight option that won't add significant bulk to a Micro Four Thirds setup.

The 25mm focal length places it in the standard focal length range, suitable for a variety of everyday shooting scenarios. Both autofocus and manual focus are supported, offering flexibility across different shooting styles. The 52mm filter thread makes it easy to attach commonly available filters, and the lens is designed exclusively for the Micro Four Thirds (MFT) format.

Note that this lens has no image stabilization, so shooters should account for that when working in low-light or handheld situations.

Pros — Yongnuo YN25mm f/1.7

  • ✓Wide maximum aperture of f/1.7 supports shooting in lower-light conditions
  • ✓Very lightweight at just 150g, ideal for travel and everyday use
  • ✓Supports both autofocus and manual focus operation

Cons — Yongnuo YN25mm f/1.7

  • ✗No image stabilization, which may require compensation in handheld low-light scenarios
  • ✗Fixed 25mm focal length offers no zoom flexibility
  • ✗Lens format limited to Micro Four Thirds — not compatible with other camera systems

Videos — Yongnuo YN25mm f/1.7

Yongnuo 25mm F1.7 - Incredible Value AF Micro Four Thirds Lens — Robin Wong

Resources & Downloads — Yongnuo YN25mm f/1.7

Manuals & Guides

Frequently Asked Questions — Yongnuo YN25mm f/1.7

What camera system is this lens compatible with?+
The Yongnuo YN 25mm f/1.7 is designed for the Micro Four Thirds mirrorless camera system. It uses a Micro Four Thirds lens mount, so it is compatible with MFT-mount mirrorless cameras from manufacturers who use that standard.
Does this lens support autofocus?+
Yes, the lens supports autofocus as well as manual focus. Shooters can switch between the two focus modes depending on their shooting needs.
Does the YN 25mm f/1.7 have image stabilization?+
No, this lens does not include image stabilization. Photographers will need to rely on any in-body stabilization their camera may offer, or use a faster shutter speed to manage camera shake.
What filter size does this lens use?+
The lens has a 52mm filter thread, which is a common size and makes it straightforward to find compatible filters such as UV, polarizing, or ND filters.
How heavy is this lens?+
The Yongnuo YN 25mm f/1.7 weighs 150 grams, making it a lightweight option well-suited for Micro Four Thirds mirrorless systems where compact size and low weight are often priorities.

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