|
GB1035990A
|
|
Optical system focussing device
|
|
GB1028691A
|
|
Optical system of variable focal length
|
|
FR1336300A
|
|
Variable focal length optical system
|
|
GB988879A
|
|
Improvements in and relating to range and view finders
|
|
US3181445A
|
|
View finder
|
|
GB923268A
|
|
Device for accurately transforming a rotary movement into a translational movement
|
|
GB912681A
|
|
Improvements in or relating to oscillatory devices
|
|
US3120064A
|
|
Oscillatory devices intended more particularly for optical appliances
|
|
US3195432A
|
|
Camera focusing device for use with photographic and cinematographic cameras
|
|
GB964575A
|
|
Improvements in or relating to afocal optical systems
|
|
US3094580A
|
|
Afocal optical system focal length changer
|
|
US2897724A
|
|
Large-aperture objective
|
|
US2969706A
|
|
Optical range-finder
|
|
GB851487A
|
|
Optical finders
|
|
GB835054A
|
|
Objective having a very large aperture
|
|
DE1134219B
|
|
Extremely high light intensity lens
|
|
US2845845A
|
|
Orthoscopic wide angle objective
|
|
GB798132A
|
|
Orthoscopic wide angle objective
|
|
GB784014A
|
|
Improvements in and relating to view finders
|
|
DE1087826B
|
|
Optical system with variable focal length
|
