| 摘要 |
An imaging lens system consisting of a front lens unit which comprises a negative lens component disposed on the image side and has a positive refractive power, and a rear lens unit which is composed of a positive lens component: a distance ffb as measured from an object side surface of the rear lens unit to a front focal point of the rear lens unit, a distance D as measured from an exit pupil of the front lens unit to an object side surface of the rear lens unit, and refractive powers of the front lens unit and the rear lens unit being adequately defined for the imaging lens system.
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