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Due to the optical properties of photographic lenses, only objects within a limited range of distances from the camera will be reproduced clearly. The process of adjusting this range is known as changing the camera's focus. There are various ways of focusing a camera accurately. The simplest cameras have fixed focus and use a small aperture and wide-angle lens to ensure that everything within a certain range of distance from the lens, usually around 3 metres (10 ft) to infinity, is in reasonable focus. Fixed focus cameras are usually inexpensive types, such as single-use cameras. The camera can also have a limited focusing range or scale-focus that is indicated on the camera body. The user will guess or calculate the distance to the subject and adjust the focus accordingly. On some cameras this is indicated by symbols (head-and-shoulders; two people standing upright; one tree; mountains).

Rangefinder cameras allow the distance to objects to be measured by means of a coupled parallax unit on top of the camera, allowing the focus to be set with accuracy. Single-lens reflex cameras allow the photographer to determine the focus and composition visually using the objective lens and a moving mirror to project the image onto a ground glass or plastic micro-prism screen.

Twin-lens reflex cameras use an objective lens and a focusing lens unit (usually identical to the objective lens.) in a parallel body for composition and focusing. View cameras use a ground glass screen which is removed and replaced by either a photographic plate or a reusable holder containing sheet film before exposure. Modern cameras often offer autofocus systems to focus the camera automatically by a variety of methods.

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64,86 €
  • Digital IS helps reduce the effect of camera shake
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  • 720p HD video capabilities.
  • 20.0 Megapixel
  • 8x Optical Zoom with Optical Image Stabilize
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383,10 €
  • 24.2 megapixels
  • Camera and smartphone
  • Record 4K UHD movies
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102,41 €
  • 1 Year Manufacturer's Warranty
  • Target Finding AF for accurate, intelligent autofocus
  • HD 720p videos with sound bring your memories to life
  • 18 Scene Modes for effortless photos
  • 8x optical zoom and 16x Dynamic Fine Zoom
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412,57 €
300,00 € OFFER
  • Lens Mount: Canon EF mount
  • Wi-Fi and NFC supported
  • Standard ISO: 100 to 6400, expandable to 12800
  • 9-point AF with 1 center cross-type AF point
  • 18MP APS-C CMOS sensor and DIGIC 4+
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346,26 €
200,00 € OFFER
  • 24.2 megapixels
  • Camera and smartphone
  • Creative control at every step, for photographing the dynamic pulse of city life
  • An ideal starting companion
  • Record 4K UHD movies
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73,53 €
560,00 € OFFER
  • Comes with a 18-55mm VR kit lens, BF-1B body cap, BS-1 accessory shoe cover, DK-25 rubber eyecup
  • Full HD (1920 x 1080) movie
  • 3.2-inch LCD vari-angle monitor
  • 23.5 x 15.6 mm DX format CMOS sensor
  • 24.2 effective megapixels
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