Zeiss Batis 85mm f/1.8

The Zeiss Batis 85mm f/1.8 is a short telephoto prime for Sony E full-frame cameras. The 85mm focal length suits portraiture, from head-and-shoulders frames to tight head shots. Wedding and event photographers can also use it for candid work at a polite distance. Zeiss introduced this lens in 2015, so it is an older model.

Its main strength is the f/1.8 maximum aperture, which passes much more light than the slow ends of typical zooms. The trade-off is the single focal length. You compose by moving yourself, and you carry a second lens when wider framing is needed. In return, you get a lighter, smaller lens than a fast zoom covering this length.

The lens weighs 15.9 oz (452 g), so it stays comfortable through a long portrait session. That is a modest figure for a full-frame short telephoto. It measures 3.62 in (92 mm) long and 3.19 in (81 mm) wide. A screw-in filter must match the 67mm thread.

At 85mm you can fill the frame with a head-and-shoulders portrait from a comfortable distance. That distance also flatters facial features, keeping them in natural proportion. Indoors, you may need room to step back for a half-length portrait. Because the focal length never changes, you quickly learn where to stand for each portrait.

The f/1.8 aperture works in dim venues such as evening receptions and window-lit interiors. You can hold shutter speeds usable without pushing ISO as far. The wide aperture also separates a person from a busy background, blurring distractions behind the face. For motion, the wide aperture buys shutter speed for a dancing couple indoors without flash.

Nine aperture blades help keep the opening round as you stop down. Background highlights then stay smooth rather than edged, a benefit when you close the aperture a stop or two for extra depth of field.

The lens focuses as close as 2.6 ft (80 cm). That is enough for a tight head shot, and it keeps a workable gap between you and the subject.

Built-in image stabilisation steadies the camera during handheld shooting. It helps reduce blur from camera shake when the light drops and a tripod is impractical. Evening receptions and location portraits gain from that leeway. Paired with the wide aperture, it keeps many dim sessions handheld.

Weather sealing helps guard the interior against dust and moisture. Location portraits often mean beaches, fields and city streets, so that protection suits the work. The front glass has no fluorine coating, so keep a microfibre cloth handy for water spots and fingerprints.

Inside are three low-dispersion elements. This glass type helps reduce chromatic aberration, the effect where colours focus at slightly different points and leave coloured fringes along high-contrast edges. In portrait terms, that means rim light on hair against a bright sky. The fringes that remain depend on the whole design, not the count alone.