Zoom lens having diffraction-type optical element and image pickup apparatus using the same
OwnerAyami Imamura, Hisashi Gotoinventors
Life of this patent
Estimating the term…
Abstract
A zoom lens is provided with, in order from the object side, at least, a positive first group with a diffraction-type optical element, a positive second group, and a negative third group. A space between the first and second groups and a space between the second and third groups are increased in changing a magnification from the wide-angle end position to the telephoto end position, and the third group is fixed.
Claims5
A zoom lens comprising, in order from the object side, at least, a positive first group with a diffraction-type optical element, a positive second group, and a negative third group,
- wherein a space between the first and second groups and a space between the second and third groups increase in changing a magnification from the wide-angle end position to the telephoto end position, and the third group is fixed.
A zoom lens comprising, in order from the object side, a positive first group with a diffraction-type optical element, a positive second group, a negative third group, a positive fourth group, and a positive fifth group,
- wherein, in changing a magnification, at least the first group is capable of moving, and each of spaces between the groups changes.
Dependencies are inferred from the claim text.