OM System M.Zuiko Digital ED 12-40mm f/2.8 Pro II
Bright Even in Low Light
A powerful zoom that features a large aperture and high-speed autofocus, the OM System M.Zuiko Digital ED 12-40mm f/2.8 Pro II is compact and lightweight that weighs under 400g, which is 50% lighter than other standard zoom lenses. The OM System M.Zuiko Digital ED 12-40mm f/2.8 Pro II is also weather-sealed and has a fluorine coating to repel dust and dirt, perfect for busy photographers who love the outdoors.
- Bright and fast f/2.8 constant aperture for exceptional image quality.
- Customisable L-fn button conveniently placed on the lens barrel.
- Manual Focus Clutch mechanism for instant switching between autofocus and manual focus.
- Advanced weather-sealed construction to keep out unwanted elements.

Get $200 cashback when you buy this camera from 15th June to 15th July 2026. via online redemption.
Powerful, Compact and Lightweight
This powerful M.Zuiko Digital ED 12-40mm f/2.8 Pro II compact zoom lens from OM System is truly essential as it can handle everything from wide-angle to mid-range telephoto shots. With the lens' bright and fast f/2.8 aperture. it can deliver an exceptional image quality in all conditions.
Function Button
The L-fn button is conveniently placed on the lens barrel is available to be assigned to do a specific action or assign a custom setting that is most suitable for your shooting style.
Manual Focus Clutch
Switch from autofocus mode to manual mode is made simple on this lens, just simply pull the focus ring towards the camera body to switch on manual mode without losing your focus and framing on the subject.
Weather-Sealed Construction
Shoot worry-free with the OM SystemOM System M.Zuiko Digital ED 12-40mm f/2.8 Pro II Lens, the advanced system of seals keeps out the unwanted elements.


Key Features
- Bright and fast f/2.8 constant aperture for exceptional image quality.
- Customisable L-fn button conveniently placed on the lens barrel.
- Manual Focus Clutch mechanism for instant switching between autofocus and manual focus.
- Advanced weather-sealed construction to keep out unwanted elements.
- Compact and lightweight design ideal for travel and everyday shooting.
Benefits
* Versatile Focal Range: Easily transition from wide-angle landscapes to mid-range telephoto portraits without changing lenses.
* Seamless Operation: Assign custom settings to the L-fn button for a workflow tailored to your unique shooting style.
* Intuitive Focusing: Pull the focus ring towards the camera body to engage manual mode instantly, ensuring you never lose framing on your subject.
* Reliable Durability: Shoot worry-free in challenging environments thanks to the robust system of weather seals.
Specifications
- Focal Length: 12-40mm
- Maximum Aperture: f/2.8
- Lens Type: Compact Zoom
- Focus Mechanism: Autofocus with Manual Focus Clutch
- Custom Controls: L-fn (Lens Function) Button
- Build: Weather-Sealed Construction
FAQs
1. Is the OM System 12-40mm f/2.8 Pro II weather-sealed?
Yes, it features an advanced system of seals to keep out dust and moisture, allowing you to shoot worry-free in challenging conditions.
2. How does the Manual Focus Clutch work?
Simply pull the focus ring towards the camera body to instantly switch from autofocus to manual mode without losing focus or framing on your subject.
3. What is the L-fn button used for?
The L-fn (Lens Function) button is conveniently located on the lens barrel and can be assigned to a specific action or custom setting that best suits your shooting workflow.
4. Is this lens suitable for low-light photography?
Absolutely. The bright and fast constant f/2.8 aperture delivers exceptional image quality and performance in various lighting conditions.
5. What type of photography is this lens best for?
With its wide-angle to mid-range telephoto capabilities, it is highly versatile and ideal for landscapes, portraits, events, and everyday enthusiast shooting.
How to Use / Care Instructions
- To switch to manual focus, gently pull the focus ring backward toward the camera body.
- Assign your most frequently used camera setting to the L-fn button via your camera's custom menu for quick access in the field.
- While the lens features advanced weather sealing, always wipe down the exterior with a clean, dry cloth after shooting in wet or dusty environments.
- Store the lens in a cool, dry place and consistently use the front and rear caps to protect the glass elements when not in use.
| Best Seller | No |
|---|---|
| Sale | No |
| Promo Type | $200 CASHBACK |
| Autofocus | Yes |
| Focal Length | 12-40mm |
| Format Compatibility | Micro Four Thirds |
| Groups/Elements | 14 elements in 9 groups |
| Product Weight | 1.000000 |
| Brands | OM System |
| Wi-Fi Enabled | Yes |
| Cashback Enable | No |
| Speciality | Constant Aperture Zoom |
| Genre/Use | General |
| Lens Type / Category | Wide Angle Lenses |
| Focal Length | 12-40mm |
| Minimum Focus Distance | 0.2m |
| Lens Hood | Removable |
| Filter Thread | 62mm |
| Diaphragm Blades | 7 (circular aperture diaphragm) |

