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Zenni Optical mail order. Zenni Optical was founded in 2003 by Tibor Laczay and Julia Zhen. [1] [2] Before being renamed to Zenni Optical when it began offering $7 and $8 glasses, the company was named 19dollareyeglasses.com. [3] [4] [5] Around 2014, co-founder Zhen acquired the building occupied by the Marin Independent Journal to house Zenni. [6]
The Micro Four Thirds system (MFT) of still and video cameras and lenses was released by Olympus and Panasonic in 2008; lenses built for MFT use a flange focal distance of 19.25 mm, covering an image sensor with dimensions 17.3 × 13.0 mm (21.6 mm diagonal).
Although the -OJ suffix was never used for a production lens, a prototype MC Rokkor-OJ 24 mm f /2.8 lens was shown at Photokina 1970. [2] In addition to Rokkor-branded lenses, Minolta also sold a lower-cost line of lenses, designated Celtic. [3]: 66 Compared to the Rokkor lenses, Celtic lenses have less sophisticated coatings. [4]: 8
The first lens to carry the Rokkor designation was a 200mm f / 4.5 lens that came with the hand-holdable aerial camera Chiyoda SK-100 in 1940. [1] After the Rokkor name was dropped and no longer engraved in new lenses after 1980/1981, [1] the Rokkor name resurfaced two times.
A fast prime (fixed focal length) lens, the Canon 50mm f / 1.4 (left), and a slower zoom lens, the Canon 18–55mm f / 3.5–5.6 (right); this lens is faster at 18mm than it is at 55mm. Lens speed is the maximum aperture diameter, or minimum f-number , of a photographic lens .
Nordstrom's Half-Yearly Sale features markdowns on a slew of products that regularly sell out at their regular price — that's a compelling reason to snap these deals up soon rather than later.
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