lens ring
31Canon EF 200mm lens — Infobox photographic lenses name = EF 200mm f/2.8L (first edition) maker = Canon feat is = n feat usm = y feat sbf = n feat macro = n feat special = L Series type = p application = Pro telephoto prime flength = 200mm fov = 1.0 aperture = f/2.8… …
32Canon EF 70-300mm lens — The EF 70 300mm lens is a telephoto zoom lens made by Canon Inc.The lens has an EF mount to work with the EOS line of cameras.Two Canon EF telephoto zoom lenses carry the 70 300mm designation. These are the EF 70 300mm f/4.5 5.6 DO IS USM and the …
33Sigma 70-300mm f/4-5.6 APO DG Macro lens — Infobox photographic lenses name = Sigma 70 300 mm APO DG Macro maker = Sigma feat is = n feat usm = n feat sbf = n feat macro = y feat special = type = z application = Consumer Telephoto Zoom flength = 70 300mm fov = aperture = f/4 f/5.6 groups …
34contact lens — one of a pair of small plastic disks that are held in place over the cornea by surface tension and correct vision defects inconspicuously. Cf. hard lens, intraocular lens, soft lens. [1885 90] * * * Thin artificial lens worn on the surface of the …
35Soemmering ring — 1. a doughnut shaped remnant of lens behind the pupil, occurring after cataract surgery or secondary to trauma as a result of contact between the anterior capsule and the posterior capsule, which traps varying amounts of lens substance… …
36Canon EF 28-135mm lens — Infobox photographic lenses name = Canon EF 28 135 f/3.5 5.6 IS USM maker = Canon feat is = y feat usm = y feat sbf = n feat macro = y feat special = type = z application = Standard telezoom flength = 28 135 mm fov = 1.0 aperture = f/3.5 5.6 f/36 …
37Intrastromal corneal ring segments — Intrastromal corneal rings (or intracorneal rings) are small devices implanted in the eye to correct vision. A typical vision correction using corneal rings would involve an ophthalmologist making a small incision in the cornea of the eye, and… …
38capsular tension ring — in cataract surgery, a small ring that is inserted into the lens capsule for support when the supportive structure of the lens is particularly weak …
39Vossius ring — a ring of pigment on the lens caused by pressure of the pupillary margin against the lens following a contusion …
40Einstein-Ring — Bei einem Einsteinring handelt es sich um einen Ring elektromagnetischer Strahlung eines weit entfernten Objekts, der durch die Wirkung der Gravitation einer Vordergrund Galaxie zustande kommt. Die Galaxie wirkt dabei als Gravitationslinse.… …
