Rear conversion lens

Details Rear conversion lens Rear conversion lens

1989-03-24

1990-02-13

Arnold, Bruce Y.

350422, G02B 1510, G02B 960

Patent

active

049001418

ABSTRACT:
A rear conversion lens which is to be mounted between a main lens and a predetermined image plane for attaining a larger resultant focal distance than a focal distance of the main lens basically comprises, in the order taken from an object, a first lens unit having a positive refractive power and a second lens unit having a negative refractive power, and has a negative refractive power as a whole.
The structure meets the following conditional formulas.

REFERENCES:
patent: 4770508 (1988-09-01), Yamada et al.

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