Zoom lens and image pickup apparatus having the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Nov 13, 2018
Grant Date -
Jan 25, 2018
app pub date -
Jul 11, 2017
filing date -
Jul 19, 2016
priority date (Note) -
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Abstract
A zoom lens includes, in order from an object side to an image side, first to fifth lens units respectively having positive, negative, positive, positive, and negative refractive powers. The first lens unit does not move for zooming, and each of the distances between the lens units adjacent to each other is changed during zooming. Lateral magnifications β2w and β2t of the second lens unit at a wide angle end and a telephoto end, respectively, lateral magnifications β3w and β3t of the third lens unit at the wide angle end and the telephoto end, respectively, lateral magnifications β4w and β4t of the fourth lens unit at the wide angle end and the telephoto end, respectively, a focal length f5 of the fifth lens unit, and an amount of movement M5 of the fifth lens unit in zooming from the wide angle end to the telephoto end are appropriately set.
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