OM SYSTEM M.Zuiko 12-40mm F2.8 PRO II Lens

The OM SYSTEM M.Zuiko 12-40mm F2.8 PRO II is a Micro Four Thirds zoom lens with a constant F2.8 designation in its title and listing. Its 12-40mm range suits wide-to-standard framing, while the stated weather-sealed design and manual-focus clutch add useful controls for compatible camera users.

At a glance

12-40mm zoom covers wide-angle through mid-range telephoto framing, with the listing describing a 24-80mm 35mm-equivalent range.
Title specifies F2.8, and the manufacturer copy describes the lens as useful in low light.
Listing identifies autofocus and manual focus, alongside a manual-focus clutch feature.
Weather-sealed design and fluorine coating are stated features, not independently verified protection ratings.

Price

$999.99Save 17%

Reference price: ~~$1,199.99~~

Price checked: Nov 14, 2026

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Often bought together

OM SYSTEM OM-3 Silver Mirrorless Camera Body, 20.4MP Four Thirds, 4K 60p Video, Creative Dial, Computational Photography, 5-Axis Image Stabilization, IP53 Weather-Sealed

$1,699.00

Pros and cons

Pros

A 12-40mm range can cover a variety of everyday perspectives without changing lenses.
Autofocus and manual focus are both listed, and the title calls out an MF clutch.
The stated fluorine coating and weather-sealed design may appeal to photographers working outdoors.

Technical specifications

21 specifications

Identity
Brand	OM SYSTEM
Model	m.zuiko

Optics and focusing
Focal length	12 millimeters
Maximum focal length	40
Lens design	Zoom
Lens type	Standard
Focus type	Auto Focus, Manual Focus
Zoom ratio listed	3.3x
Maximum aperture listed	2.8 millimeters
Minimum aperture	22
Diaphragm blades	7
Angle of view	84.1 degrees
Lens coating	ZERO (Zuiko Extra-Low Reflection Optical) Coating, Flourine

Compatibility and protection
Mount	Micro Four Thirds
Compatible devices	Mirrorless Camera
Water resistance listed	Water Resistant
Image stabilization listed	Digital

Other listing details
Video format listed	MP4
Weight listed	381 g
Filter size listed	6.2 centimeters
Color	Black

What to know before buying

Listing details to confirm

Listing details are inconsistent: the title and manufacturer description identify a 12-40mm F2.8 PRO II, while the detail fields give conflicting maximum-focal-length, aperture-unit and lens-fixed-focal-length entries, plus a digital stabilization claim. Treat these detail-field specifications as unconfirmed and verify the selected listing before purchase. The water-resistance field does not specify a protection rating or operating limits.

Who is it for?

A good fit for

Micro Four Thirds mirrorless camera owners seeking a general-purpose 12-40mm zoom.
Photographers who want autofocus with a manual-focus option and clutch.
Users looking for a wide-to-midrange zoom with a weather-sealed-design claim.

Less suited to

Photographers needing a longer telephoto reach than the stated 12-40mm range.
Buyers who require a documented water-resistance rating or precise stabilization specification.

OM SYSTEM M.Zuiko 12-40mm F2.8 PRO II Lens · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 191 ratings

5 stars87%87%
4 stars5%5%
3 stars4%4%
2 stars0%0%
1 star4%4%

Customer feedback highlights perceived lens quality, image quality and sharpness. For buyers considering the listed 12-40mm zoom and autofocus/manual-focus options, that praise is relevant to image-making, but it does not verify optical performance or settle the inconsistent technical detail fields. Rating distribution is mostly five-star, with a smaller low-star segment, so feedback is not uniformly positive.

Positive themes

Customers describe the lens as high quality and sharp, with positive comments about image quality.

Frequently asked questions

Which camera mount is listed for this lens?

The listing specifies a Micro Four Thirds mount and identifies mirrorless cameras as compatible devices.

Does it support manual focusing?

Yes. The listed focus types are autofocus and manual focus, and the title also specifies an MF clutch.

Is the lens weather resistant?

The title claims a weather-sealed design and a detail field says water resistant, but no protection rating or operating limits are given.

What comes in the package?

The listing supplies a built-in media list that names a lens, hood, caps, wrapping cloth, manual and warranty. Confirm the selected listing's package contents before ordering.