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This is for companies who exclusively or predominantly create optical lenses for still and film photography. Subcategories This category has the following 10 subcategories, out of 10 total.
Varilux is a brand name belonging to Essilor International, a producer of corrective lenses. The first version of the lens was invented by Bernard Maitenaz and released in 1959, and was the first modern [clarification needed] progressive lens to correct presbyopia. The progressive lens is characterized by correcting near, intermediate and far ...
Optical glass refers to a quality of glass suitable for the manufacture of optical systems such as optical lenses, prisms or mirrors.Unlike window glass or crystal, whose formula is adapted to the desired aesthetic effect, optical glass contains additives designed to modify certain optical or mechanical properties of the glass: refractive index, dispersion, transmittance, thermal expansion and ...
Founded in Stuttgart in 1968 as A.I.C. Phototechnik GmbH by Allied Impex Corporation (USA), the company changed its official name in 1993 to match the brand name used on its optical products. Most commonly encountered products were manufactured in Japan (to quite a reasonable standard-many by Tokina ) under the Soligor brand, as well as Miranda ...
Mid-index: 1.54 ≤ n d < 1.60; High-index: 1.60 ≤ n d < 1.74; Very high index: 1.76 ≤ n d; This is a general classification. Often for marketing purposes, materials with n d values that are at or above 1.60 can be referred to as "high-index". Likewise, Trivex and other borderline normal / mid-index materials may be referred to as mid-index.
In the 2017 fiscal year, such lenses accounted for 74.9% of all sales. [1] Interchangeable lenses for digital and conventional SLR cameras, including compact high-ratio zoom lenses of which Tamron was the pioneer in 1992 when it released the 28–200 mm. [3] The most-current lens of this type is the AF 16–300 mm F/3.5-6.3 Di II VC PZD MACRO ...