Telephoto lens system

Details Telephoto lens system Telephoto lens system

1982-04-05

1985-05-21

Corbin, John K.

G02B 964, G02B 1302

Patent

active

045182299

ABSTRACT:
A telephoto lens system comprising a front lens group of a positive refractive power fixed on the optical axis and a rear lens group of a negative refractive power is provided. The rear lens group consists, from the object to the image side, of a first positive subunit fixed on the optical axis, a second negative subunit movable along the optical axis and a third positive subunit fixed on the optical axis, the second negative subunit being movable toward the image side for focusing to a closer object. The object side end surface of the first positive subunit is concave and fulfills the following condition in relation with the front lens group:

REFERENCES:
patent: 4204747 (1980-05-01), Imai
patent: 4240703 (1980-12-01), Momiyama
patent: 4359272 (1982-11-01), Kreitzer
patent: 4437734 (1984-03-01), Iizuka

Affiliated with

Also associated with

Rating

Telephoto lens system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Telephoto lens system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephoto lens system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1535117