A DSLR camera (Digital Single-Lens Reflex) is a type of digital camera that uses a mirror and prism system to reflect light from the lens to the camera's optical viewfinder. This allows the photographer to see the image they are about to capture in real-time and make any necessary adjustments before taking the photo.
DSLR cameras have interchangeable lenses, which means that you can change the lens depending on the type of photography you want to do. They also have larger image sensors than point-and-shoot cameras, which results in better image quality, especially in low light conditions. DSLRs are popular with professional photographers and serious hobbyists because of their versatility and ability to capture high-quality images.
The most popular brands are Canon and Nikon. With the push to Mirrorless Cameras, DSLR will eventually be a thing of the past.