Sigma 50mm F1.2 DG DN Art

This prime from 2024 pairs a 50mm focal length with a large f/1.2 aperture. It covers full frame and comes in separate Sony E and L-Mount versions. Choose the version that matches your camera. In tight rooms, check that you can step back far enough for the composition you want.

It suits portraits, weddings and everyday work in dim venues. The aperture can soften a distant background behind a nearby person and gives more room for useful shutter speeds. The trade-off is a substantial body with no built-in stabilization.

The Sony E version weighs 1 lb 10.1 oz (740 g) and measures 4.36 in (110.8 mm) long. Its 3.19 in (81 mm) width makes it substantial on a compact camera. The L-Mount version has a different weight and length. Both versions use a 72mm front thread for screw-in filters.

On full frame, 50mm gives a standard view suited to people, table scenes and everyday subjects. Your distance controls perspective, so leave space when you want less emphasis on nearby facial features. A fixed focal length makes position important: moving to change the framing also changes the relationship between foreground and background.

The f/1.2 aperture admits more light than a smaller opening. In a reception room or evening street, you can use that difference for a faster shutter speed or lower ISO. Let the subject decide the balance. A moving person needs a faster exposure than a still object in the same light.

At close distances, f/1.2 can create a thin sharp zone. Focus on the near eye for a portrait and watch for small movements. Place the person farther from the background to make it easier to soften. Stop down when more of a face or several people need to remain clear.

Closest focus is 1.3 ft (40 cm), measured from the sensor. That suits details on a table; most portraits benefit from more space. Maximum magnification is 0.16x. Leave room ahead of the glass and avoid casting a shadow onto a close subject.

The design resists dust and splashes, which helps during outdoor portrait sessions. Use cover in persistent rain. Both mount versions have a water- and oil-repellent coating on the front glass, making fingerprints and spots easier to clean.

There is no stabilization inside the lens. A camera with body stabilization can reduce camera shake for still subjects. For slow exposures or steady video, use firm support. The bright aperture also gives more room for a faster shutter speed as light falls.

The design uses 17 elements in 12 groups, including four aspherical elements. Their shaped surfaces help correct distortion and spherical aberration, which can bend straight lines or soften detail. This matters when a doorway sits behind a portrait subject. Internal focusing keeps the barrel length fixed as focus changes.