| 摘要 |
<p>A zoom lens including a first lens unit exhibiting a positive refractive power and always being statically positioned along an optical axis when a power of the zoom lens is varied or the focusing is conducted and including a reflective optical element for bending an optical path, a second lens unit exhibiting a negative refractive power and including a negative lens, a negative lens and a positive lens, along the optical axis in this order from an object side, a third lens unit exhibiting a positive refractive power, a fourth lens unit exhibiting a positive refractive power, and including at least two positive lenses, and a fifth lens unit exhibiting a negative refractive power, wherein the second lens unit, the fourth lens unit and the fifth lens unit are moved for varying the power of the zoom lens.</p> |
