Title:
VERY BRIGHT WIDE ANGLE OBJECTIVE LENS HAVING BACK FOCAL LENGTH AT LONG IMAGE SIDE
Document Type and Number:
Japanese Patent JPS51120724
Kind Code:
A
Abstract:
An extremely high speed wide angle objective lens system, wherein a reducing Newtonian finder telescope is arranged in front of an objective lens group which produces a real image on an image plane. Rules or conditions are stated, and several specific examples are given. In many of the examples, the back focus distance is relatively large, thus making the lens system suitable for use with a mirror reflex camera where room is needed for swinging the reflex mirror.
More Like This:
| JPS642011 | PHOTOGRAPHING LENS |
| WO/2022/265450 | OPTICAL SYSTEM AND CAMERA MODULE COMPRISING SAME |
| JPS63174008 | GAUSSIAN LENS |
Inventors:
HERUMUUTO FUITSUSHIYAA
EAHARUTO GURATSUTSUERU
BARUTAA YAAN
HAINTSU TSUAYADATSUTSU
EAHARUTO GURATSUTSUERU
BARUTAA YAAN
HAINTSU TSUAYADATSUTSU
Application Number:
JP3507676A
Publication Date:
October 22, 1976
Filing Date:
March 29, 1976
Export Citation:
Assignee:
ZEISS STIFTUNG
International Classes:
G02B9/64; G02B13/04; G02B13/18; (IPC1-7): G02B9/64; G02B13/04
Domestic Patent References:
| JPS4912820A | 1974-02-04 | |||
| JPS4869512A | 1973-09-21 | |||
| JPS4912823A | 1974-02-04 |
Foreign References:
| US3736049A | 1973-05-29 |