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US4726669A
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High relative aperture objective lens system with compound focusing
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US4270848A
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Image enlarging optical variator
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US3537780A
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Motion picture film magazine
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GB1094386A
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Optical objectives
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GB1047320A
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Guide device enabling a barrel bearing a lens to be moved to and fro in a longitudinal direction
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GB975309A
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Variable focal length lens system
|
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GB975160A
|
|
Improvements in or relating to variable focal length lens systems
|
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GB961483A
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Improvements in or relating to guide means permitting the longitudinal displacement of a barrel carrying lens
|
|
GB943180A
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Variable focal length lens system
|
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GB945652A
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Improvements in or relating to variable focal length or variable magnification lens systems
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GB881775A
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Automatic control device for lens diaphragm
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GB752179A
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Optical objective having a very large aperture
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GB720808A
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Improvements in wide-angle objectives
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GB692847A
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Binocular magnifier
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GB700573A
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A device for verifying optically projected images
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GB673358A
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Improvements in wide-angle objectives
|
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GB673353A
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|
Improvements in large aperture objectives
|
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GB637087A
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Improvements in view finders for reflex photographic cameras
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GB443061A
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Improvements in or relating to optical projection apparatus
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GB438932A
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Improvements in or relating to cinematographic apparatus
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