Electrically driven zoom lens barrel

Details Electrically driven zoom lens barrel Electrically driven zoom lens barrel

1991-02-14

1992-11-17

Ben, Loha

Optical: systems and elements

Lens

With variable magnification

359697, 359823, 354400, 354486, G02B 1500

Patent

active

051648601

ABSTRACT:
An electrically driven zoom lens barrel is provided with an indicating plate for indicating whether a zooming operation is being carried out in an electric mode or a manual mode. The indicating plate is provided separately from a zooming operation ring, which is moved forward to rearward to switch a zooming operation between the electric mode and the manual mode. The indicating plate displays the manual mode when the zooming operation is carried out in the manual mode, and displays the electric mode and a zooming direction when the zooming operation is carried out in the electric mode.

REFERENCES:
patent: 3834796 (1974-09-01), Komine
patent: 4890132 (1989-12-01), Hama
patent: 4936664 (1990-06-01), Haraguchi et al.

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