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Transitions Optical is a U.S.-based company known for manufacturing photochromic lenses, which darken on exposure to specific types of light. The company was founded in 1990. [1] In 1991, Transitions Optical became the first company to commercialize and manufacture plastic photochromic lenses. [2]
A photochromic eyeglass lens, part of the lens darkened after exposure to sunlight while the other part remained covered. A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation. In the absence of activating light, the lenses return to their clear state.
In contrast to soft focus lenses, STF lenses render a perfectly sharp image in the focus plane. Lenses featuring Smooth Trans Focus technology: Minolta STF 135mm F2.8 [T4.5] (introduced 1999) Sony α STF 135mm F2.8 [T4.5] (SAL-135F28) (introduced 2006) Sony FE 100mm F2.8 STF GM OSS (SEL-100F28GM) (introduced 2017) [1]
A screen—especially a touchscreen—is a nice feature as well if you want to review your shots while ... you don’t want to damage or scratch the lens or lenses on a 360 action camera—as such ...
In the end, Maintenaz's invention would be fixed between Essel's bifocal lens, the Diachrolux, and its trifocal lens, the Trilux. Without much brainstorming, Maintenaz's progressive lens was given a name following suit with the other premium products: Varilux. [7] The lens was launched officially in May 1959 at the Hotel Lutetia in Paris, France.
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