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  2. Sigma SD14 - Wikipedia

    en.wikipedia.org/wiki/Sigma_SD14

    The Sigma SD14 is a digital single-lens reflex camera produced by the Sigma Corporation of Japan.It is fitted with a Sigma SA mount which takes Sigma SA lenses.. The camera was announced on August 29, 2006 with a "teaser" advertising campaign [1] and was unveiled at the photokina trade show in Cologne, Germany on 2006-09-26. [2]

  3. Edmund Scientific Corporation - Wikipedia

    en.wikipedia.org/wiki/Edmund_Scientific_Corporation

    Edmund Scientific Corporation, based in Barrington, New Jersey, was founded in 1942 as a retailer of surplus optical parts like lenses.It later branched out into complete systems like telescopes and microscopes, and in the 1960s, a wide variety of science toys and kits.

  4. Need to Work in the Dark? Turn to One of These Editor ... - AOL

    www.aol.com/done-dark-turn-one-rechargeable...

    S1000 Tactical Rechargeable Flashlight (2-pack) GearLight’s S1000 rechargeable flashlight is a fully featured option that’s compact enough for everyday use and equipped with zoom, focus, and ...

  5. Liquid-mirror telescope - Wikipedia

    en.wikipedia.org/wiki/Liquid-mirror_telescope

    The force of gravity (red), the buoyancy force (green), and the resultant centripetal force (blue) In the following discussion, represents the acceleration due to gravity, represents the angular speed of the liquid's rotation, in radians per second, is the mass of an infinitesimal parcel of liquid material on the surface of the liquid, is the distance of the parcel from the axis of rotation ...

  6. Spotting scope - Wikipedia

    en.wikipedia.org/wiki/Spotting_scope

    The larger the objective, the more massive and expensive the telescope. The optical assembly has a small refracting objective lens, an internal image-erecting system, and an eyepiece that is usually removable. The image-erecting system may use relay lenses, prisms such as Porro or roof prisms, or a catadioptric system of the Schmidt or Maksutov ...

  7. Objective (optics) - Wikipedia

    en.wikipedia.org/wiki/Objective_(optics)

    Two Leica oil immersion microscope objective lenses; left 100×, right 40×. The objective lens of a microscope is the one at the bottom near the sample. At its simplest, it is a very high-powered magnifying glass, with very short focal length. This is brought very close to the specimen being examined so that the light from the specimen comes ...