Patent ID: 9152020
Filing Date: 2015-10-06
Classification: G02B,G03B

Abstract:
1. A camera, comprising: a camera body; an optical lens connected to said camera body comprising two or more optical adjusting rings; and two or more additional knurled rings movably and detachably connected on the outside of said optical adjusting rings respectively, wherein said additional knurled rings are rotated to drive said optical adjusting rings to rotate respectively, so as to adjust said optical adjusting rings, wherein one of said additional knurled rings has a front annular portion, a rear annular portion, a front tooth formed at said front annular portion, and a rear tooth formed at said rear annular portion, wherein an outer diameter of said front annular portion and a quantity of said front tooth don't match with an outer diameter of said rear annular portion and a quantity of said rear tooth.