ACCESSORY, IMAGE CAPTURING APPARATUS WHEREON IT CAN BE INSTALLED, AND CAMERA SYSTEM Russian patent published in 2021 - IPC G03B17/14 H01R13/213 

FIELD: photography.

SUBSTANCE: invention relates to an objective bayonet mount, an image capturing apparatus whereon the objective bayonet mount can be installed, and to a camera system. The claimed objective bayonet mount is configured to be detachably installed on the camera bayonet mount including a restricting fragment and multiple first fragments with bayonet protrusions, wherein the objective bayonet mount comprises: multiple second fragments with bayonet protrusions configured to provide engagement with the multiple first fragments with bayonet protrusions; and a restricted fragment configured to be restricted by the restricting fragment when the objective bayonet mount is installed on the camera bayonet mount. The multiple second fragments with bayonet protrusions therein include a first and a second protrusions adjacent with the restricted fragment in the circumferential direction, and a protrusion on the opposite side, located on the opposite side from the restricted fragment relative to the first and second protrusions in said circumferential direction, wherein 75°≤θ10≤105°, 75°≤θ20≤105°, 75°≤θ30≤105° and 75°≤θL≤105° are satisfied, wherein from the inner corners of the quadrangle formed by connecting the centre of the protrusion on the opposite side, the centre of the second protrusion, the centre of the first protrusion, and the centre of the restricted fragment, θ10 constitutes an inner corner wherein the vertex thereof constitutes the centre of the protrusion on the opposite side, θ20 constitutes an inner angle wherein the vertex thereof constitutes the centre of the second protrusion, θ30 constitutes the inner corner wherein the vertex thereof constitutes the centre of the first projection, and θL constitutes an inner corner wherein the vertex thereof constitutes the centre of the restricted fragment. Also claimed is an adapter configured to be detachably installed on an objective apparatus containing the described objective bayonet mount.

EFFECT: increased accuracy of retaining the interchangeable objective assembly installed on the body of the camera when external forces are applied from different directions or when the orientation of the interchangeable objective assembly is changed.

41 cl, 27 dwg