Patent ID: 8840543

Claim:
A coupler for connecting an endoscope to a camera, the coupler defining an axis and comprising: a housing assembly configured to be connected to a camera and an endoscope, the housing assembly including a cylinder mounting at least one zoom lens and at least one focus lens therein; a zoom adjustment member and a focus adjustment member located outside of the cylinder of the housing assembly, the zoom adjustment member engaging the cylinder with a first coefficient of friction and being movable relative thereto to cause axial movement of the at least one zoom lens within the cylinder of the housing assembly, the zoom adjustment member being operatively connected to the focus adjustment member such that movement of the zoom adjustment member causes the focus adjustment member to move thereby moving both the at least one zoom lens and the at least one focus lens axially within the cylinder, the focus adjustment member engaging the zoom adjustment member with a second coefficient of friction and being movable relative thereto to cause axial movement of the at least one focus lens within the cylinder of the housing assembly, the first coefficient of friction being greater than the second coefficient of friction such that movement of the focus adjustment member does not cause movement of the zoom adjustment member.