A wide-angle lens is commonly used for interior real-estate photos, but technique matters more than going as wide as possible.

The biggest tip from experienced real-estate shooters is to keep vertical lines straight. If walls and corners are vertical in real life, they should look vertical in the photo. This usually means keeping the camera level rather than tilting it up or down, since wide lenses make distortion and leaning walls much more obvious.

A tripod, low ISO, and a moderate-to-small aperture are good choices because interiors often need longer exposures. Sharp, clean files are more important than handholding.

Watch your highlights carefully. Interior lights that blow out can be distracting, and if possible you should balance the exposure between bright windows and the room so the space feels larger and the outside view is visible.

White balance should look natural and pleasant rather than overly warm. The goal is an inviting, accurate rendering of the room, not an artificial glow.

In short: use the wide lens carefully, keep the camera level, control highlight clipping, and aim for balanced, natural-looking light.