A digital camera is a camera that, instead of recording images on photosensitive film as analogue cameras, captures images using an electronic sensor and stores them in a memory in digital media. In this way, the digital camera allows access to images recorded instantly, avoiding processing in laboratory of analog photography. Types there are different types of digital camera: Compact/Ultracompactas: they are small, comfortable to carry, simple, little configurable and offer limited benefits. The lens is not interchangeable but they have enough resolution and zoom to obtain acceptable images. Bridge: they are among the compact and SLR in size, price, functionality and quality. They are not interchangeable lens, zoom, screen LCD with live-preview and advanced features. Reflex DSLR: digital version of analog SLR SLR with a sensor which replaces the film. This type of digital camera has optical interchangeable viewfinder with mirror and pentaprism, LCD screen, high quality sensors and controls, automatic and manual, but are more heavy, awkward to transport and expensive than the Compact.
There are two form factors for sensor, 3: 2 (such as 35 mm, conventional DSLR negative) and 4: 3 (4/3 SLR, Four Thirds and four thirds). Micro 4/3 (Micro FourThirds, Micro four thirds) or EVIL (Electronic Viewfinder Interchangeable Lens): is a standard for digital camera sensor shared with Micro Four Thirds camera, but without mirror viewfinder. They are halfway between the compact and SLR, for its size and weight have the portability of the compact, but by its interchangeable optics provide a quality similar to the reflex. Integrated digital camera: is common to find cameras integrated in electronic devices, such as mobile phones, PDAs or tablet PCs. Although its benefits were scarce at the beginning, their quality improves quickly by great demand, having become one of the main sale arguments.
Features see the main features of a digital camera: resolution: the resolution of a digital camera is given by the sensor and is expressed in pixels, for example an image of 1024 960 Mp. connectivity will have 1.228.800 pixels, approximately 1.3: most can be connected to the computer via USB or FireWire, or via wireless network Wi-Fi or Bluetooth. Many cameras support protocols that enable to send images directly to the printer without the intervention of the PC. Storage: Although many cameras have internal memory, usually use external memory to save pictures, common formats (CompactFlash, SD, Memory Stick) memory cards. Formats: the photos can be stored in compressed formats lossy (JPEG) or lossless (TIFF, RAW). Generally incorporate metadata Exif or similar. Video: typically a digital camera can also record video and audio, in formats AVI, DV, MPEG, MOV or WMV. Battery: a digital camera has a high energy consumption, so it is very important the autonomy of the battery or the availability of spare batteries or rechargeable batteries.