Close-up attachment lens

Details Close-up attachment lens Close-up attachment lens

1998-07-28

1999-12-14

Epps, Georgia

Optical: systems and elements

Lens

Multiple component lenses

359784, 359672, 359673, G20B 914

Patent

active

060025336

ABSTRACT:
A close-up attachment lens, for enabling close-up photograph along with a main lens, is arranged to be attached to the object side of said main lens. The close-up attachment lens comprises, in that order from the object side, a positive first lens element, a negative second lens element, and a positive third lens element formed as a meniscus lens that is convex on the image side. Furthermore, the close-up attachment lens satisfies the following conditions:

REFERENCES:
patent: 5216546 (1993-06-01), Hasushita
English Language Abstarct of JP-5-224121, Sep. 3, 1993.
English Language Abstract of JP-53-16628, Feb. 15, 1978.
D. Laney, entitled "Leica Lens Practice: Choosing and Using Leica Lenses", Hove Books, pp. 146-147, Jul. 1993.

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