OM System M.Zuiko Digital ED 8-25mm f/4.0 PRO

The M.Zuiko Digital ED 8-25mm f/4.0 PRO is an ultra-wide zoom for Micro Four Thirds cameras. It runs from 8mm, an extreme wide angle, to 25mm, a normal view. At 8mm it can take in a whole room from a corner. Released in 2021, it covers landscape, architecture and interior work in one lens.

That range suits photographers who frame wide scenes but also want a tighter view without changing lenses. The trade-off is a modest f/4 maximum aperture. The lens has no built-in stabilisation, which favours daylight or tripod work.

The lens weighs 14.5 oz (411 g) and measures 3.48 in (88.5 mm) long with a 3.03 in (77 mm) body. That is a light, short package for a wide zoom, and it stays comfortable on long landscape walks. The 72mm front thread accepts screw-in filters, useful for a polariser on bright days.

On Micro Four Thirds this is an ultra-wide-to-normal zoom. Framing can move from a whole interior to a tighter view of one wall without changing position. That span suits real estate and travel, where the room may be small or the scene open.

The f/4 maximum aperture stays constant, so exposure settings carry over across the zoom. At these wide settings, depth of field runs deep even wide open. That helps keep a foreground rock and distant hills sharp together. In dim interiors or at dusk, expect to raise ISO or use a support.

Close focusing suits this lens's wide views. It focuses to 0.8 ft (23 cm), so foreground detail such as rocks or flowers can sit very near the camera. A near foreground also gives a wide scene a stronger sense of depth. Maximum magnification reaches 0.42x, enough for a small subject to fill a large share of the frame. The optics specification scores 68.

Weather sealing suits the outdoor scenes this lens is made for. On a rainy coastline or a dusty trail, the sealing lets you keep shooting rather than pack the camera away. The front element carries a fluorine coating. It helps water and oil slide off, so spray wipes away quickly after a shoot.

The features specification scores 52. There is no stabilisation in the lens, so slow handheld shutter speeds risk blur in dim light. Wide angles hide small camera movements better than long lenses do, but the lens offers no help of its own.

There is also no zoom lock. Nothing holds the barrel at a chosen length when the camera hangs from a strap.

Three aspherical elements, one of them bi-aspherical, help correct distortion, which can bend straight lines at wide settings. That matters for architecture, where straight walls and doorframes dominate the frame.

Three low-dispersion elements help reduce chromatic aberration, the coloured fringes that can show along high-contrast edges such as branches against sky. Focusing happens inside the lens rather than by extending it, so the lens keeps its length as it focuses.