Ones with varifocal lenses.

used varifocal box cameras.this for better in banks

For cameras, about 1902. Production of the patent from that year did not take place until about 1932 and was used in 35mm movie cameras as the first true zoom (meaning the focal plane did not shift appreciably when the lens was zoomed). The concept was first invented for telescopes around 1834, but it was a varifocal lens, in that it did not maintain focus when zoomed).

A varifocal lens is a non-fixed focal length lens where the focus changes with focal length. This is in contrast to true zoom lenses, which retain correct focus throughout their focal length range. True zooms have a constant maximum aperture at all focal lengths (as in a 28-70mm f/2.8 lens), while varifocals have maximum apertures that increase (in number, but decrease is size!) as the focal length increases (as in a 28-70mm f/3.5-5.6 lens, which has a maximum aperture of f/3.5 at 28mm, that becomes smaller in size as the focal length increases until it reaches a value of f/5.6 at 70mm).

Varifocals are easier to design and build than true zooms which explains their ubiquity in the camera market. Note that they are commonly, but erroneously, referred to as zoom lenses by users and manufacturers alike.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern V---F-C--. That is, nine letter words with 1st letter V and 5th letter F and 7th letter C. In alphabetical order, they are:

varifocal

venefical