GB785573A
(https= )
1900-01-01
SE8304735D0
(sv )
1983-09-01
Improvements in or rehting to infra-red lenses
GB900249A
(en )
1962-07-04
Improvements in and relating to varifocal lenses
GB1441119A
(en )
1976-06-30
Zoom lens
GB944787A
(en )
1963-12-18
Photographic objectives
GB1333755A
(en )
1973-10-17
Optical system for a microscope
GB1292341A
(en )
1972-10-11
A zoom lens
GB1241135A
(en )
1971-07-28
Wide angle zoom objective
GB724698A
(en )
1955-02-23
Improvements in and relating to photographic objectives
US1025766A
(en )
1912-05-07
Photographic objective.
US4368955A
(en )
1983-01-18
Variable-focal-length objective
US2346086A
(en )
1944-04-04
Photographic objective
GB1092677A
(en )
1967-11-29
Varifocal objective system
US2932236A
(en )
1960-04-12
Anamorphosing lens system
GB1397508A
(en )
1975-06-11
Optical lens systems
US2682198A
(en )
1954-06-29
Photographic objective consisting of two negative meniscus components between two positive components
GB191413119A
(en )
1915-05-27
Improvements relating to Lenses for Photographic, Microscopic, Projection or similar purposes.
US2466424A
(en )
1949-04-05
Four component highly corrected wide angular field objective with small petzval sum
GB1076789A
(en )
1967-07-19
Photographic objective of continuously variable focal length
GB755955A
(en )
1956-08-29
Improvements in or relating to microscope objectives
US3384435A
(en )
1968-05-21
Four component photographic objective of the gauss type
GB132303A
(https= )
1900-01-01
GB472191A
(en )
1937-09-20
Improvements in and relating to objectives suitable for photographic purposes
US56125A
(en )
1866-07-03
Improvement in binocular eye-pieces for optical instruments
GB1013540A
(en )
1965-12-15
Improvements relating to photographic objectives