An endoscope eyepiece grasping mechanism for an endoscope camera head, the endoscope eyepiece grasping mechanism comprising: - a base part with a central eyepiece receiving region with a light passage opening, the base part comprising an axially extending wall; - a radially moveable tab member positioned relative to the axially extending wall; - an engagement member connected to the tab member; - an annular part comprising an outer engagement surface and inner camming surface, the annular part being disposed coaxially with the base part and being axially moveable in an axial direction relative to the base part, the engagement surface being moveable with said camming surface to move the tab member radially outwardly, with a movement of the annular part relative to the base part in a first axial direction toward a receiving position, and to move the tab member radially inwardly, with movement of the annular part relative to the base part in a second axial direction toward a grasping position in which an endoscope eyepiece within the central eyepiece receiving region is grasped by the grasping mechanism to couple the endoscope eyepiece to the endoscope camera head; and - a biasing device acting between the base part and the annular part to bias the annular part in the second direction toward the grasping position, whereby an endoscope eyepiece may be inserted in the central eyepiece receiving region in the receiving position and the endoscope eyepiece is engaged by the tab member and retained in the eyepiece receiving region upon the annular part moving from the receiving position to the grasping position; wherein the inner camming surface is formed by an axially extending camming wall portion defining a slot; characterised in that: - the engagement member comprises a pin at each side of the tab member; and - the axially extending camming wall portion has a circumferential extent with a radially outwardly extending portion defining each slot. - a base part with a central eyepiece receiving region with a light passage opening, the base part comprising an axially extending wall; - a radially moveable tab member positioned relative to the axially extending wall; - an engagement member connected to the tab member; - an annular part comprising an outer engagement surface and inner camming surface, the annular part being disposed coaxially with the base part and being axially moveable in an axial direction relative to the base part, the engagement surface being moveable with said camming surface to move the tab member radially outwardly, with a movement of the annular part relative to the base part in a first axial direction toward a receiving position, and to move the tab member radially inwardly, with movement of the annular part relative to the base part in a second axial direction toward a grasping position in which an endoscope eyepiece within the central eyepiece receiving region is grasped by the grasping mechanism to couple the endoscope eyepiece to the endoscope camera head; and - a biasing device acting between the base part and the annular part to bias the annular part in the second direction toward the grasping position, whereby an endoscope eyepiece may be inserted in the central eyepiece receiving region in the receiving position and the endoscope eyepiece is engaged by the tab member and retained in the eyepiece receiving region upon the annular part moving from the receiving position to the grasping position; wherein the inner camming surface is formed by an axially extending camming wall portion defining a slot; characterised in that: - the engagement member comprises a pin at each side of the tab member; and - the axially extending camming wall portion has a circumferential extent with a radially outwardly extending portion defining each slot. - the engagement member comprises a pin at each side of the tab member; and - the axially extending camming wall portion has a circumferential extent with a radially outwardly extending portion defining each slot.