Patent ID: 7702233

Claim:
An image photographing apparatus comprising: a compensation lens group; a focusing driving part for fixing the compensation lens group, the focus driving part comprising: (i) a first lens barrel combined with the compensation lens group in its interior and forming a first male screw on its outer circumference; (ii) a second lens barrel combined with a focus actuator in its exterior and forming a first female screw, which is screw-combined with the first male screw on its inner circumference; and (iii) a tool groove installed on the first lens barrel to insert and rotate a tool; a focus actuator transferring the focusing driving part to an optical axis for controlling the focus of the compensation lens group; a fixing part for supporting the focus actuator; a photographing element for photographing an image of an object passing the compensation lens group; and a controlling part for controlling the focus actuator and the photographing element.