A digital camera (or digicam for short) is a camera that takes video or still photographs, or both, digitally by recording images via an electronic image sensor.
Front and back of a Canon PowerShot A95.

Many compact digital still cameras can record sound and moving video as well as still photographs. In the Western market, digital cameras outsell their 35 mm film counterparts.

Digital cameras can do things film cameras cannot: displaying images on a screen immediately after they are recorded, storing thousands of images on a single small memory device, recording video with sound, and deleting images to free storage space. Some can crop pictures and perform other elementary image editing. Fundamentally they operate in the same manner as film cameras, typically using a lens with a variable diaphragm to focus light onto an image pickup device. The combination of the diaphragm and a shutter mechanism is used to admit the correct amount of light to the imager, just as with film; the only difference is that the image pickup device is electronic rather than chemical.

Digital cameras are incorporated into many devices ranging from PDAs and mobile phones (called camera phones) to vehicles. The Hubble Space Telescope and other astronomical devices are essentially specialised digital cameras.

Wednesday, October 28, 2009

Canon EOS 500D / Rebel T1i

Canon EOS 500D / Rebel T1i

In addition to its admirable performance with an all-new 15.1 Megapixel Canon CMOS sensor, DIGIC 4 Image Processor, a 3.0-inch Clear View LCD with anti-reflective and scratch-resistant coating, and compatibility with the EOS System of lenses and Speedlites, the EOS Rebel T1i adds remarkable Full HD video capture at resolutions up to 1920 x 1080. An HDMI port allows for quick connections to high.

Specifications

Type

  • Type
    Digital, single-lens reflex, AF/AE camera
  • Recording Media
    SD memory card, SDHC memory card
  • Image Sensor Size
    22.3mm x 14.9mm (APS-C size)
  • Compatible Lenses
    Canon EF lenses including EF-S lenses (35mm-equivalent focal length is approx. 1.6x the lens focal length)
  • Lens Mount
    Canon EF mount

Image Sensor

  • Type
    High-sensitivity, high-resolution, large single-plate CMOS sensor
  • Pixels
    Effective pixels: Approx. 15.10 megapixels
  • Total Pixels
    Total pixels: Approx. 15.50 megapixels
  • Aspect Ratio
    3:2 (Horizontal: Vertical)
  • Color Filter System
    RGB primary color filters

Release Date

  • First seen
    4 January 2009
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