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1. There are two main types of digital cameras: DSLRs (digital single-lens reflex cameras) and compact cameras. DSLRs have interchangeable lenses and produce higher quality photos compared to compact cameras but are more expensive and larger in size. 2. Key features of cameras include resolution, sensor size, zoom range, aperture range, ISO sensitivity, shutter speed, video recording capabilities, battery life, and available modes/presets. DSLRs generally have higher specifications than compact cameras for features like resolution, sensor size, aperture range, and shutter speed. 3. Popular brands that produce digital cameras include Canon, Nikon, Sony, Fujifilm, Panasonic, OlympusRead less