Advance mechanism for close-up lens

In a close-up lens cylinder having at least an attaching cylinder (2) for attachment to a camera body, an operating ring (3) for operating an advance for focussing, an advancing cylinder (4) for a straight advance and a lens frame (7) for supporting a lens, the improvement comprising;

• an advancing groove (17) divided into a circumferentially extending groove (17A) and a second groove (17B), said advancing cylinder (4) provided with an advancing groove (21) divided into a circumferentially extending groove (21A) and a cam groove (21B), said advancing cylinder (4) further provided with an elongated straight guide channel (22), and a rotating cylinder (5) mounted for rotation around the inner surface of said advancing cylinder (4), said rotating cylinder (5) having a circumferentially extending groove (23) and an advancing groove (24), and a cam member (14) engaging the advancing groove (21) of said advancing cylinder (4) wherein by rotating said operating ring, initially only said lens frame is advanced with respect to said attaching cylinder without advancing of said operating ring and said advancing cylinder and after said advance is substantially completed, said operating ring and said advancing cylinder are advanced together with said lens frame.