| 摘要 |
An objective (10,20,30,40) comprises: a first group (G1) including a plurality of lens groups (LG1, LG2) arranged at a predetermined interval; a second group (G2) composed of a single lens-group (LG3); a pressing ring (14,34,44) which is screwed in, the pressing ring (14,34,44) being for fixing the first group (G1); and an outer frame (11,21,31,41) accommodating the first group (G1), the second group (G2), and the pressing ring (14,34,44), wherein the outer frame (11,21,31,41) includes a first hole (12,22,32,42) at a position facing the second group (G2).
The eccentricity adjustment on the lens group (LG3) is performed by inserting a screw into the hole (12). |
