<p>A single lens (1) having first and second aspherical surfaces (2, 3) each having a positive power is usable for an objective lens of an optical pickup for an optical recording medium. The lens satisfies the following conditions: 0.1 < ¦ m ¦ < 0.5 0.9 < @@@ < 1.2 where m denotes magnification; d denotes thickness of the lens; and f denotes focal length of the lens.</p>
