A Digital SLR, or Digital Single-Lens Reflex camera, is a type of digital camera that uses a mirror mechanism to reflect light from the lens to an optical viewfinder. This allows photographers to see exactly what the lens sees, making it easier to compose shots. Digital SLRs typically offer interchangeable lenses, giving users the flexibility to choose the best lens for their photography needs. These cameras are known for their high image quality, fast autofocus, and manual controls, making them popular among both amateur and professional photographers. With features like manual settings, RAW image format, and high ISO performance, Digital SLRs are versatile tools for capturing a wide range of subjects.