You don’t need a special camera. Star trails are made by recording the apparent movement of stars as the Earth rotates.

Basic setup:

• a sturdy tripod
• a camera that can make long exposures or shoot repeated frames
• ideally a lens with a wide/large aperture
• an interval timer or time-lapse control helps for many exposures

There are two common methods:

1. One very long exposure
2. A series of shorter exposures taken over a long period, then stacked later in software

The stacked approach is often used for long trails, and dedicated star-trail software or image editors can combine the frames.

For a circular pattern, aim near the celestial pole: north in the northern hemisphere, south in the southern hemisphere. A compass can help you find the direction. If you shoot for a long time—often around a couple of hours for pronounced trails—you’ll get longer arcs.

So the key is not a special camera, but stable support, long shooting time, and aiming toward the pole if you want the circles centered in the frame.