1976-10-28
1978-03-21
Hix, L. T.
354289, G03B 1502, G03B 1700
Patent
active
040806120
ABSTRACT:
A data display for use in a strobo unit which includes a manual controlling device for manually controlling the illumination, an automatic controlling device for controlling the illumination by means of a light receiving element which serves as means for determining an external light, and a TTL controlling device for controlling the illumination by means of a second light receiving element disposed within the camera for determining reflected light from a shutter blade or a film surface. The data display comprises a first stationary display panel carrying a diaphragm aperture dial and a guide number dial for use in a manual control mode, a diaphragm aperture dial and a range dial for use in an automatic control mode, and a plurality of indicia for selection of the manual, automatic and TTL controlling devices, all disposed in interrelated and concentric relationship. The data display also comprises a second stationary display panel disposed in concentric relationship with the first stationary display panel and carrying a dial thereon which indicates the distance to which a photographing operation is possible during the TTL control mode. Additionally, the data display also comprises a first mask plate which is disposed in concentric relationship with the first stationary display panel and rotatable relative thereto, a second mask plate which is rotatable relative to the first mask plate, but rotates integrally with the latter as it rotates, and a third mask plate which is disposed for integral rotation with the first mask plate.
REFERENCES:
patent: 3742824 (1973-07-01), Ueda et al.
patent: 3956763 (1976-05-01), Yamanaka
Kawarada Osamu
Maitani Yoshihisa
Gellner M. L.
Hix L. T,.
Olympus Optical Co,. Ltd.
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