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This is the eye of the camera and is used to capture the image it sees onto the camera's light sensitive film, or CCD in digital camera. The size of lens is measured and indicated as a focal length. Cameras come with either a fixed lens or zoom lens with a range of focal lengths (see lens range) and on some SLR and rangefinder cameras the lens detaches so others can be attached to increase versatility. With a detachable lens camera it's often possible to buy just the body with a lens of your choice.The amount of light passing through the lens is controlled by an aperture, which is often quoted with its maximum aperture setting.Buying adviceSLRs: If you intend buying a specific lens in the future make sure that it's available in the same mount as the camera you are considering or own. Also if you're upgrading cameras, buy one with the same lens fitting or one that can be adapted to save the cost of replacing all the lenses you own.Digital and compact cameras: A fixed lens camera can often be much smaller so could be selected if you need to travel light. It's also less expensive if your budget is tight. It's better, though, to choose a camera with a zoom if you can afford to, rather than using a digital zoom or cropping the picture later. Go for one with a wider angle zoom if most of your pictures will be landscapes, interiors or family group shots.Choose a version with a longer telephoto setting if you want to shoot long distance subjects, portraits and wildlife.
This is used to describe the area of a film used by a camera to record a photo. A 35mm format camera records a 24x36mm image on the film. Medium format cameras record anything from 6x4.5cm to 6x17cm on 120 and 220 roll film. When choosing a medium-format some photographers prefer the square 6x6cm format because it offers an alternative shape to the conventional oblong, but also saves you having to think in a portrait or landscape way. The cropping can be done later when printing the results. As the format increases, potential quality improves, while the number of pictures that can be recorded on a roll of film decreases. You can shoot 15 pictures on a 6x4.5cm camera, 12 on a 6x6cm camera and 10 on a 6x7cm camera and just 4 on a 6x17cm camera.
A mode on many compact cameras and some SLRs that masks the film so that a narrow strip is recorded. The result is then printed on elongated paper to give an impressive 10x4in widescreen style photo. This works better when the camera's lens is a wider angle. You don't have to have a panoramic mode to obtain this style photo. Cropping an existing negative that was printed on 10x8in paper would give the same results, but is obviously more expensive. Alternatively, if you ensure the subject is in the middle of the frame you could ask your lab to make panoramic pictures from your film when processed.