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Sidewalk prisms were cast in one piece as single or multiple-prism lenses, and inserted into load-bearing frames. Daylight redirecting film is made of acrylic. Damaged prism tiles may be repaired, and as they came in standard designs, there is a salvage market in replacements. Replacements for one-piece castings can be commissioned.
Prism name Digonal prism (Trigonal) Triangular prism (Tetragonal) Square prism Pentagonal prism Hexagonal prism Heptagonal prism Octagonal prism Enneagonal prism Decagonal prism Hendecagonal prism Dodecagonal prism... Apeirogonal prism; Polyhedron image ... Spherical tiling image Plane tiling image Vertex config. 2.4.4: 3.4.4: 4.4.4: 5.4.4: 6.4 ...
carbon footprint of 1st Life Cycle of an iPhone 11 Pro compared to iPhone XS and iPhone X Carbon footprint of 1st life cycle of an iPhone 11 Pro. The iPhone 11 Pro has a carbon footprint of 80 kilograms (180 lb) CO2e emissions, which is 10 kilograms (22 lb) more than the preceding iPhone XS and 25 kilograms (55 lb) more than the iPhone 3G in 2008.
Original bifocals were designed with the most convex lenses (for close viewing) in the lower half of the frame and the least convex lenses on the upper. Up until the beginning of the 20th century two separate lenses were cut in half and combined in the rim of the frame.
Since 1968, most Best Picture winners have been rated R under the Motion Picture Association's rating system. Oliver! is the only G-rated film and Midnight Cowboy is the only X-rated film (what is categorized as an NC-17 film today), so far, to win Best Picture; they won in back-to-back years, 1968 and 1969. The latter has since been changed to ...
Trifocal lenses are made in similar styles to bifocals, but with an additional segment for intermediate vision above the reading section. A common style is the 7×28 flat-top or D-shaped segment, 28 mm wide, with a 7 mm high intermediate segment.
In April 2018, the Federal Communications Commission divulged images of an unreleased gold-colored iPhone X model. [29] As opposed to the space gray and silver color options that the iPhone X ships with, it was divulged that there were initial plans to release a gold option for the device. However, it was put on hold due to production issues. [30]
However, for the record: the first autofocus lens for a still camera was the Konishiroku Konica Hexanon 38mm f/2.8 [171] built into the Konica C35 AF (1977, Japan) 35mm point-and-shoot; the first autofocus lens for an SLR camera was the unnamed 116mm f/8 [172] built into the Polaroid SX-70 Sonar (1978, USA) instant film SLR; the first ...