About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 73. Chapters: Single-lens reflex camera, Still camera, Pinhole camera, Folding camera, Rangefinder camera, View camera, Traffic enforcement camera, Twin-lens reflex camera, Field camera, Box camera, Press camera, Digital single-lens reflex camera, Thermal imaging camera, Thermographic camera, Superzoom, Movie camera, Instant camera, Schmidt camera, Disposable camera, Helmet camera, Electronovision, Point-and-shoot camera, Stereo camera, Astrograph, Multiplane camera, High-speed camera, Single-lens translucent camera, Plenoptic camera, Backup camera, Pool safety camera, Rostrum camera, Wright Camera, Zoom-lens reflex camera, Monorail camera, Animation camera, Rapatronic camera, Vitascan, Toy camera, Electronicam, System camera, Stat camera, List of camera types, Zenith camera, Spy cam, ATC2K, Gun camera, Low light level television, Pinhead mirror, Softcam, Pinspeck camera, Keychain camera. Excerpt: Most digital single-lens reflex cameras (digital SLR or DSLR) are digital cameras that use a mechanical mirror system and pentaprism to direct light from the lens to an optical viewfinder on the back of the camera. The basic operation of a DSLR is as follows: for viewing purposes, the mirror reflects the light coming through the attached lens upwards at a 90-degree angle. It is then reflected three times by the roof pentaprism, rectifying it for the photographer's eye. (Note that the diagram below incorrectly shows a non-roof pentaprism.) During exposure, the mirror assembly swings upward, the aperture narrows (if stopped down, or set smaller than wide open), and a shutter opens, allowing the lens to project light onto the image sensor. A second shutter then covers the sensor, ending the exposure, and the mirror lowers while the shutter resets. The period that the mirror is flipped up is referred to as "viewfinder blackout." A fast-acti...
