A high-definition (HD) surveillance/security camera? A professional video/photography camera with HD or higher resolution? A specialized camera used in scientific, industrial, or cinematic contexts? Or maybe a hidden or spy camera (sometimes referred to as "special" or "covert")? If you're looking for general info, here’s a quick overview of HD special cameras by type:

Surveillance HD Cameras (Security Cameras)

Resolution: 720p (HD), 1080p (Full HD), 4K (Ultra HD) Features: Night vision, motion detection, remote access via app, weatherproof for outdoor use Special Types: PTZ (Pan-Tilt-Zoom), bullet, dome, fisheye, or hidden spy cams

Professional Photography/Video Cameras

Brands: Canon, Sony, Nikon, Blackmagic, RED, etc. Resolution: Full HD to 8K and beyond Special Features: Interchangeable lenses, RAW video, slow motion, HDR, stabilization

Special Purpose Cameras

Scientific: Thermal cameras, hyperspectral cameras, high-speed motion capture Medical: Endoscopic cameras, dermatology cameras Industrial: Inspection cameras, machine vision cameras

Spy/Hidden Cameras

Form Factors: Pens, clocks, smoke detectors, USB chargers Features: HD recording, motion detection, loop recording, hidden lens