Monday, September 17, 2012

aperture- a circular opening in an optical devise that controls the quantity of radiation
shutter- a mechanical device for opening and closing the aperture of a camera lens to expose film or the like.
exposure-photographic film or plate when is exposed
depth of field- a camera lens which an object will produce a relatively distinct image.
F-stop-any of the settings for the f-number of the camera
focal length-the distance from a focal point of a lens to the corresponding plane.


  
parallax-is a displacement or difference in the apparent position of an object  
Pentaprism- is a five-sided reflecting prism used to deviate a beam of light 
pentax- is a brand name used by Pentax Ricoh Imaging Company for cameras 
pellicle mirror-transparent mirror employed in the light path of an optical instrument


 

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