OM SYSTEM M.Zuiko Digital ED 12-40mm f/2.8 PRO II
The OM System ED 12-40mm f/2.8 PRO II is a 12–40mm f/2.8 lens designed for Micro Four Thirds mount cameras. Used copies start from $617.11 on GearFocus, with buyer protection on every purchase.
OM SYSTEM M.Zuiko Digital ED 12-40mm f/2.8 PRO II
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Lens Overview — OM System ED 12-40mm f/2.8 PRO II
Key Features — OM System ED 12-40mm f/2.8 PRO II
Constant f/2.8 Aperture: Maintains f/2.8 throughout the entire zoom range, ensuring consistent exposure and depth of field control whether shooting at 12mm or 40mm.
24-80mm Full-Frame Equivalent: The 12-40mm range translates to a versatile 24-80mm equivalent on Micro Four Thirds, covering wide-angle through short telephoto in a single lens.
PRO II Weather Sealing: Dust- and splash-proof construction with freeze-proofing down to -10°C, making it suitable for shooting in rain, dust, and cold conditions.
ED Glass Elements: Extra-low dispersion glass minimizes chromatic aberration for sharper, higher-contrast images across the zoom range.
Micro Four Thirds Mount: Native MFT mount ensures full electronic compatibility with OM System and Panasonic Micro Four Thirds mirrorless cameras.
Autofocus & Manual Focus: Supports both AF and MF operation, with a focus clutch mechanism for quick switching between modes without diving into menus.
Lens Specifications — OM System ED 12-40mm f/2.8 PRO II
| Spec | Detail |
|---|---|
| Use Cases | Travel |
| Lens Type | Zoom |
| Format | Micro Four Thirds (MFT) |
| Zoom/Prime | Zoom |
| Focal Length | 12–40mm |
| Maximum Aperture | f/2.8 |
| Camera System | Mirrorless |
| Lens Mount | Micro Four Thirds |
| Autofocus | Yes |
| Focus Type | Auto, Manual |
| Image Stabilization | None |
| Filter Thread | 62mm |
Description — OM System ED 12-40mm f/2.8 PRO II
The OM System M.Zuiko Digital ED 12-40mm f/2.8 PRO II is a Micro Four Thirds mount zoom lens designed for mirrorless camera systems. It covers a focal length range of 12-40mm and maintains a constant f/2.8 maximum aperture throughout the zoom range, giving photographers consistent exposure and depth-of-field control at every focal length. The lens supports both autofocus and manual focus, offering versatility across different shooting scenarios.
With a 62mm filter thread, it works with a wide range of commonly available filters. Weighing 382g, it strikes a balance between optical capability and portability. The lens is classified in the wide angle focal length range category and is optimized for the Micro Four Thirds format.
Note that image stabilization is not present in the lens itself, so users should factor in their camera body's stabilization capabilities when evaluating this lens for handheld shooting.
Pros — OM System ED 12-40mm f/2.8 PRO II
- ✓Constant f/2.8 maximum aperture maintained across the full 12-40mm zoom range
- ✓Supports both autofocus and manual focus operation for shooting flexibility
- ✓Relatively lightweight at 382g for a constant-aperture zoom lens
Cons — OM System ED 12-40mm f/2.8 PRO II
- ✗No built-in image stabilization (specifications list imageStabilization as 'None'), so stabilization depends entirely on the camera body
- ✗Micro Four Thirds mount limits compatibility to MFT-system cameras only
- ✗Maximum focal length of 40mm may feel limiting for photographers who also need reach beyond standard coverage
Videos — OM System ED 12-40mm f/2.8 PRO II
OM SYSTEM 12-40mm f2.8 Pro II - Hands On! — Peter Forsgård