Selective mode angle finder for SLR camera
Combination sun-moon filter
Bi-periscopic instrument for use in determining terrestrial positions through celestial observation
ApplicationNo. 658048 filed on 02/20/1991
US Classes:359/419, With plural optical axes359/421, Selectable magnification359/821Plural lenses in common carrier selectively operable (e.g., turret type, etc.)
ExaminersPrimary: Fields, Carolyn E.
Assistant: Dunn, Drew A.
Attorney, Agent or Firm
Foreign Patent References
International ClassG02B 023/00
AbstractAn ocular turret telescope system for attachment to a conventional reflecting or refracting telescope or other optical instrument includes a plurality of integrated optical adjustment features. A rack and pinion slidable adjustment provides a viewer with a resolution adjustment. A rotatable filter and magnification selection turret enables the selection of one of several filters and/or magnification levels. A selectable eyepiece housing enables the selection of one of several eyepiece barrels of different aperture sizes which are sighted along the telescope barrel via an internal, reflecting mirror mounted at a 45 degree angle. Also, an end-mounted specialized eyepiece or camera mount automatically urges the internal, reflecting mirror upward and out of the optical viewing path of the specialized eyepiece or camera when the eyepiece or camera is connected to the ocular turret system.