COM ARTS 155 Chapter Notes - Chapter 3: Normal Lens, 16 Mm Film, Telephoto Lens
13 Sep 2016
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Document Summary
Light travels through a lens into a camera body where the image plane is located. Image plane - reflection surface for image. Lenses made up of series of curved glass that bend light and focus an upside down reflection onto the image plane. Image plane can be strip of film or a computer chip called ccd or cmos. Digital sensors create electrical signals in response to the light received. Focal length - distance from center of glass in lens to the image plane in camera body; measured in millimeters (mm) The shorter the focal length, the wider the image captured. Lenses characterized by focal length such as: Wide angle - takes in more of the scenery but objects seem farther than regular. Normal - approximates human angle of vision. Telephoto - tight frame that makes object seem closer than usual. Prime - lenses with only one single focal length; sharper images.
