Telephoto zoom lens

Details Telephoto zoom lens Telephoto zoom lens

1990-10-19

1992-06-30

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359685, G02B 1514

Patent

active

051268833

ABSTRACT:
A telephoto zoom lens, when viewed from the object, comprises: a first lens group having positive refracting power; a second lens group having negative refracting power; a third lens group having positive refacting power; a fourth lens group having positive refracting power; and a fifth lens group having negative refacting power, wherein, when magnification is varied from the wide angle end to the telephoto end, an air interval between the first lens group and the second lens group is enlarged, an air interval between the second lens group and the third lens group is reduced, an air interval between the third lens group and the fourth lens group is enlarged and an air interval between the fourth lens group and the fifth lens group is reduced.

REFERENCES:
patent: 4673258 (1987-06-01), Masumoto
patent: 4789229 (1988-12-01), Yamanashi
patent: 4842385 (1989-06-01), Tanaka
patent: 4861145 (1989-08-01), Kikuchi

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1869263