Zoom lens and imaging apparatus including the same

An imaging apparatus comprising:

• a zoom lens;
• and
• an image sensor configured to receive an image formed by the zoom lens,
• wherein the zoom lens comprises, in order from an object side to an image side:
• a first lens unit having positive refractive power,
• a second lens unit having negative refractive power,
• a third lens unit having positive refractive power, and
• a rear group including one or more lens units,
• wherein an interval between adjacent lens units is changed in zooming,
• the first lens unit is positioned closer to the object side at a telephoto end than at a wide-angle end,
• the first lens unit includes at least four lenses,
• the first lens unit includes one or more positive lenses using a material that satisfies
• 85.0<νd1P<100.0
• where an Abbe number of materials of positive lenses included in the first lens unit is νd1P, and
• a conditional expression of
• 5.0<M1/fW<40.0
• is satisfied where a focal length of the zoom lens at the wide-angle end is fW, and an amount of movement of the first lens unit on an optical axis at zooming from the wide-angle end to the telephoto end is M1.