It’s a multi-camera GoPro rig: several action cameras mounted on a custom frame and triggered together. These setups are commonly used to capture the same moment from many angles at once.

A common purpose is creating a “bullet time” effect, where playback appears to freeze or slow while the viewpoint moves around the subject. They can also be used for action sports, special effects, 3D/volumetric experiments, or stitching multiple views in post.

This kind of rig is used more often for video than for still photography, although it can do both. The advantage is synchronized multi-angle capture in a compact, rugged setup. The tradeoff is image quality: action cameras are convenient and wide-angle, but generally don’t match DSLR or mirrorless cameras for still-image quality.