image sharpness scale
1ISS — phot. abbr Image Sharpness Scale telecom. abbr. Ionosphere Sounding Satellite …
2photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
3Depth of field — The area within the depth of field appears sharp, while the areas in front of and beyond the depth of field appear blurry …
4motion-picture technology — Introduction the means for the production and showing of motion pictures. It includes not only the motion picture camera and projector but also such technologies as those involved in recording sound, in editing both picture and sound, in… …
5Visual acuity — 20/15 and 20/15 vision redirect here. For other uses, see 2020 (disambiguation). Typical Snellen chart used for visual acuity testing. Visual acuity (VA) is acuteness or clearness of vision, which is dependent on the sharpness of the retinal… …
6History of the single-lens reflex camera — The history of the single lens reflex camera predates the invention of photography in 1826/27 by one and a half centuries with the use of a reflex mirror in a camera obscura first described in 1676. Such SLR devices were popular as drawing aids… …
7Infrared photography — Top: tree photographed in the near infrared range. Bottom: same tree in the visible part of the spectrum …
8Minolta Dimage 7, 7i, 7hi — Minolta DiMage 7i The Minolta DiMage 7, 7i, 7Hi series is a pro sumer line of digital electronic viewfinder cameras from Minolta. These are also known as bridge digital cameras. They are capable of capturing images in the 5 megapixel range. The… …
9Bernhard Schmidt — Bernhard Woldemar Schmidt (March 30, 1879 ndash; December 1, 1935) was an Estonian Swede optician who spent his adult life in Germany. In 1930 he invented the Schmidt telescope which corrected for the optical errors of spherical aberration, coma …
10F-number — In optics, the f number (sometimes called focal ratio, f ratio, or relative aperture [Smith, Warren Modern Lens Design 2005 McGraw Hill] ) of an optical system expresses the diameter of the entrance pupil in terms of the focal length of the lens; …
