OM SYSTEM M.Zuiko Digital ED 12-40mm f/2.8 PRO II Lens

The M.Zuiko Digital ED 12-40mm f/2.8 PRO II from OM SYSTEM is a professional-grade standard zoom that redefines versatility for Micro Four Thirds shooters. Unlike typical kit lenses, this constant f/2.8 aperture optic delivers edge-to-edge sharpness across its entire 24-80mm equivalent range, making it a true workhorse for everything from sweeping landscapes to intimate portraits. Its rugged, weather-sealed construction ensures reliable performance even in dust, rain, or freezing temperatures down to -10°C, so you can shoot with confidence wherever the assignment takes you.

Highlights

• Constant f/2.8 maximum aperture for consistent exposure and low-light capability
• Advanced optical design with 14 elements in 9 groups, including aspherical, ED, HR, and HD elements for exceptional clarity and minimal aberrations
• ZERO (Zuiko Extra-low Reflection Optical) coating and fluorine coating suppress flare, ghosting, and repel water and oil
• Dustproof, splashproof, and freezeproof construction for reliable outdoor use
• Manual focus clutch mechanism for instant switching between autofocus and precise manual focus

In daily use

The 12-40mm PRO II excels as an everyday lens for Micro Four Thirds photographers. Its versatile focal range covers wide-angle to short telephoto, allowing you to capture expansive scenes, environmental portraits, and detailed close-ups without changing lenses. The close focusing distance of just 0.2 m at the wide end and a maximum magnification of 0.28x at the telephoto end enable creative close-up work. The internal focusing design keeps the lens length constant, and the manual focus clutch provides tactile, repeatable manual focus when needed. The rounded 7-blade diaphragm produces smooth, circular bokeh for pleasing out-of-focus backgrounds.

Full specifications

• Lens type: Standard zoom
• Focal length: 12-40mm (35mm equivalent: 24-80mm)
• Maximum aperture: f/2.8
• Minimum aperture: f/22
• Lens mount: Micro Four Thirds
• Format compatibility: Micro Four Thirds
• Angle of view: 84° to 30°
• Minimum focus distance: 0.2 m (at 12mm), 0.25 m (at 40mm)
• Maximum magnification: 0.21x (at 12mm), 0.28x (at 40mm)
• Optical design: 14 elements in 9 groups
• Special elements: 2 aspherical ED, 1 DSA, 2 aspherical, 1 ED, 2 HR, 1 HD
• Diaphragm blades: 7, rounded
• Autofocus: Yes
• Image stabilization: No (relies on camera body IS)
• Filter size: 62 mm (front)
• Weather sealing: Dust, splash, and freeze-proof (-10°C)
• Coating: ZERO (Zuiko Extra-low Reflection Optical) coating, fluorine coating
• Focus type: Internal focusing
• Control ring: Manual focus clutch mechanism

Final note

With its combination of constant f/2.8 brightness, rugged build, and advanced optics, the M.Zuiko Digital ED 12-40mm f/2.8 PRO II is the definitive standard zoom for demanding Micro Four Thirds photographers.