Interchangeable lens for SLR-cameras having TTL light metering

Details Interchangeable lens for SLR-cameras having TTL light metering Interchangeable lens for SLR-cameras having TTL light metering

1977-11-09

1980-01-01

Gellner, Michael L.

354289, G03B 1718

Patent

active

041814193

ABSTRACT:
In an interchangeable lens assembly for single lens reflex cameras the f-stop preselection ring is provided with a first transmission element for transmitting the preselected f-stop value into the light metering instrument of the camera housing, and with a second transmission element for controlling a device in the camera housing which indicates the preselected f-stop value. Said first and second transmission elements are parts of one common setting member which is in such a manner fixedly mounted on the preselection ring that -- when the preselection ring is in its base position -- said first transmission element assumes the same position in all interchangeable lenses while said second transmission element assumes positions that vary according to the maximum opening of the lens.

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