Tamron: setting standards for Vari-Focal lenses
Tamron: setting standards for Vari-Focal lenses. The 1/3” 3.5 – 8 mm Vari-Focal lens was introduced by Tamron in 1992 and started the so-called “Vari-Focal Boom” in the CCTV market. Many other lens manufacturers developed their own Vari-Focal lens with similar features, and this focal length range is very popular even today.
Tamron widened its line up, with the additional 1/3” 8 – 12 mm F/1.4 and 1/3” 5 – 50 mm F/1.4, which were the first CCTV Vari-Focal lenses using aspherical lens elements. Exactly these aspherical lens elements were used to introduce the most widely spread CCTV lens of all, the 1/3” 3.0 – 8 mm F/1.0 – introduced by the company in 2002.
The firm was also the first to introduce IR corrective lenses, and in 2007 it presented the first 1/3” Megapixel lenses developed for the CCTV Market. These lenses (1/3”; 3.0 – 8 mm F/1.0; 2.4 – 6 mm F/1.2; 5 – 5 0mm F/1.4) are not only suitable to resolve Megapixel resolution until the corners of a sensor, they have also a user-friendly design.
Therefore the lenses feature a very big focus ratio to compensate the depth of field decrease and the delay due to IP technology, which makes it more difficult for the installer to get a well-focused picture.
Ifsec, Hall 5, Stand B45
