OM System M.Zuiko 25mm f/1.8 II

This 2025 prime gives Micro Four Thirds photographers a standard 25mm for everyday work. That angle suits street scenes, markets, travel and relaxed indoor photography, where people appear within their surroundings rather than isolated from them.

OM System released this lens in 2025 and lists it as in production. It can serve as a single-lens travel choice when you are happy framing everything at 25mm.

The f/1.8 aperture suits dim rooms and evening streets. The trade-off is the fixed focal length: you frame by moving, and the lens has no stabilisation of its own.

At 5.5 oz (156 g), 2.34 in (59.4 mm) wide and 1.65 in (42 mm) long, this lens adds almost nothing to a bag or a camera. That size makes it easy to keep mounted as a default lens on a compact body. Filters screw directly into the 46mm front thread, so a matching polariser or ND filter fits without adapters.

On the Micro Four Thirds format, 25mm gives the standard angle. It records a scene close to the way you saw it, without the stretch of a wide angle or the compression of a telephoto. Streets, café tables and family rooms keep their natural proportions, so it works well for walking-around photography and quick reactions.

The f/1.8 maximum aperture earns its keep in weak light. Under street lamps, at a dusk market or inside a restaurant, it holds shutter speeds you can handhold without pushing sensitivity high. This is the payoff for accepting a fixed focal length.

Open at f/1.8, the lens also sets a near subject apart from its setting. A portrait made a few feet away keeps the person clear while the background softens, which suits candid and reportage work. Stopped down, depth of field spreads enough for group scenes at ordinary distances.

Closest focus sits at 0.8 ft (25 cm), near enough to frame a plate of food or a stall detail without crowding it. The optics specification scores 81 out of 100.

Weather sealing is the main feature here. The sealed body resists dust and moisture, so drizzle over a street market or dust on a dry trail need not end the shoot. Sea spray and sandy ground pose the same hazards in another form. You wipe the barrel and carry on, which suits outdoor work in changeable weather.

There is no image stabilisation built in. Handheld stills remain practical in most light, thanks to the 25mm angle and the f/1.8 aperture. Handheld video and long indoor exposures call for a stabilised body or a tripod. The features specification scores 32 out of 100.

Two of the nine elements carry aspherical surfaces. Such surfaces help correct optical faults, including distortion, which can bow straight edges in scenes full of doorframes and window lines. Focusing happens inside the barrel, so the lens holds its length as focus shifts rather than extending toward the subject.