Fast telephoto lens

Details Fast telephoto lens Fast telephoto lens

1987-01-20

1988-03-22

Corbin, John K.

350475, G02B 900

Patent

active

047324597

ABSTRACT:
A fast telephoto lens has a longer focal length of 300 to 400 mm, and an F-number of about 2.0 to 2.8, which does not utilize a floating mechanism, has a small deviation in aberration when the lens is focused on an object, and has a simple construction for shifting only one lens group. The fast telephoto lens is of internal focusing type and comprises positive, negative and positive lens groups from the object side, and only the negative (second) lens group is shifted to obtain an in-focus state.

REFERENCES:
patent: 4348084 (1982-09-01), Kitagishi et al.
patent: 4518229 (1985-05-01), Yasukuni

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-438946