Autofocus: Focus Can Be Adjusted Manually By The Photographer Or Automatically By An
Autofocus System.
Parallax: Causes Framing Errors In Close-Up Shots.
Focus: The Viewfinder Can Include A Matte Focusing Screen Located Just Above The Mirror System To Diffuse The Light. This Permits Accurate Viewing, Composing And Focusing, Especially Useful With
Interchangeable Lenses.
Pixel: The Smallest Addressable Screen Element; It Is The Smallest Unit Of Picture That Can Be
Controlled.
Aperture: A Usually Circular And Often Variable Opening In An Optical Instrument Or Device That Controls The Quantity Of Radiation Entering Or Leaving It.
Shutter: A Mechanical Device For Opening And Closing The Aperture Of A Camera Lens To Expose Film Or The Like.
Exposure: A. The Act Of Presenting A Photosensitive Surface To Rays Of Light.
B. The Total Amount Of Light Received By A Photosensitive Surface Or An Area Of Such A Surface, Expressed As The Product Of The Degree Of Illumination And The Period Of Illumination.
C. The Image Resulting From The Effects Of Light Rays On A Photosensitive Surface.
Depth Of Field: The Range Of Distances Along The Axis Of An Optical Instrument, Usually A Camera Lens, Through Which An Object Will Produce A Relatively Distinct Image.
F-Stop: The Setting Of An Adjustable Lens Aperture, As Indicated By An F Number.
Focal Length: The Distance From A Focal Point Of A Lens Or Mirror To The Corresponding Principal Plane.
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