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2. Tripod head - Wikipedia

   en.wikipedia.org/wiki/Tripod_head

   Swiss camera equipment maker Arca-Swiss Phototechnik AG independently developed a quick-release mounting system for their tripod heads. The system is based on 38 mm wide mounting plates with a 45° dovetail rail on the sides, [1] which is clamped into place on the tripod head receiver with a screw-fastened grabber plate.

3. Vivitar - Wikipedia

   en.wikipedia.org/wiki/Vivitar

   Vivitar Corporation is a manufacturer, distributor, and marketer of photographic and optical equipment originally based in Santa Monica, California. [ citation needed ] Since 2008, the Vivitar name serves as Sakar International's house brand for digital imaging, optics, mobile accessories, and audio products.

4. Tripod (photography) - Wikipedia

   en.wikipedia.org/wiki/Tripod_(photography)

   The camera is attached to the ball by means of quick release plate or a simple UNC 1/4"-20 [7] screw. The socket encloses the rotating ball and also contains the controls for locking the ball. The socket has a slot on the side to allow the camera to be rotated to the portrait orientation. Ball heads come in varying degrees of complexity.

5. Samyang Optics - Wikipedia

   en.wikipedia.org/wiki/Samyang_Optics

   Samyang Optics is a South Korean manufacturer of camera lenses for several major brands of third-party mounts for still photography and video cameras.The company was founded in 1972 and has about 150 employees.

6. Tribrach (instrument) - Wikipedia

   en.wikipedia.org/wiki/Tribrach_(instrument)

   The centre of the bottom plate of the tribrach has a 5/8-11 UNC thread bolt hole which is used to attach the tribrach to the tripod. The top plate has three small holes or slots spaced 120˚ apart above leveling thumbscrews, and a locking mechanism which enables a survey instrument or target to be accurately placed on the tribrach and locked in ...

7. ZX81 - Wikipedia

   en.wikipedia.org/wiki/ZX81

   The ZX81 is a home computer that was produced by Sinclair Research and manufactured in Dundee, Scotland, by Timex Corporation.It was launched in the United Kingdom in March 1981 as the successor to Sinclair's ZX80 and designed to be a low-cost introduction to home computing for the general public.

8. Tripod (surveying) - Wikipedia

   en.wikipedia.org/wiki/Tripod_(surveying)

   The modern sturdy, but portable, tripod stand with three leg pairs hinged to a triangular metal head was invented and first manufactured for sale by Sir Francis Ronalds in the late 1820s in Croydon. He sold 140 of the stands in the decade 1830-40 and his design was soon imitated by others.