| 摘要 |
Wide-angle lens comprising floating element (G2) and aperture stop (BL) comprising a group (G1) of ten lens elements with refractive power sequence arranged in a manner mirrored in sign with respect to the stop (BL), wherein lens elements having positive and negative refractive power are arranged alternately in the light direction upstream and downstream of the stop (BL) and the group (G1) is displaceable for the purpose of focusing. |
