Photographic lens of extended focusing range with improved stabi

Details Photographic lens of extended focusing range with improved stabi Photographic lens of extended focusing range with improved stabi

1987-01-28

1989-02-28

Corbin, John K.

350464, G02B 964

Patent

active

048079839

ABSTRACT:
A photographic lens comprising four lens units, of which the first and second counting from front are of positive power, and the third and fourth have powers of opposite sign to each other, wherein as focusing is performed from infinitely distant object to nearby object, the first three units are axially moved in such differential relation that all the three air separations between the successive two units increase, while the fourth lens unit is held stationary during focusing, thereby the picture quality for the nearby object is greatly improved.

REFERENCES:
patent: 4306776 (1981-12-01), Someya
patent: 4466710 (1984-08-01), Kato et al.

Affiliated with

Also associated with

Rating

Photographic lens of extended focusing range with improved stabi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photographic lens of extended focusing range with improved stabi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photographic lens of extended focusing range with improved stabi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1361958