| 摘要 |
A single focus imaging lens comprises: a front lens group including one or two lenses and having a positive refractive power as a whole; a rear lens group including two or three lenses and having a negative refractive power as a whole; and a focusing lens, disposed between the front lens group and the rear lens group, that has a positive refractive power and moves on an optical axis for adjusting focus, wherein the following conditional expression is satisfied: <?in-line-formulae description="In-line Formulae" end="lead"?>1.0<FL/f<5.0 (X)<?in-line-formulae description="In-line Formulae" end="tail"?> where f: focal length of the single focus imaging lens; FL: focal length of the focusing lens.
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