Albada type zoom finder

Details Albada type zoom finder Albada type zoom finder

1992-02-19

1994-10-04

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359715, G02B 1514, G02B 1318

Patent

active

053531582

ABSTRACT:
An Albada zoom finder includes a first lens assembly of positive power, a second lens assembly of negative power, a third lens assembly of negative power and a fourth lens assembly of positive power, arranged in this order from the object side of a camera. An Albada frame is provided on the lens surface of the fourth positive lens assembly on the object side thereof. A reflecting surface is provided on the lens surface of the third negative lens assembly on the viewing side thereof, wherein each of the four lens assemblies is comprised of a single lens. Only the second negative lens is movable as a variable power lens assembly.

REFERENCES:
patent: 4038673 (1977-07-01), Schroder
patent: 4834513 (1989-05-01), Nozawa
patent: 4992809 (1991-02-01), Nozaki et al.
patent: 5052787 (1991-10-01), Sugawara

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