The J17ex7.7B
featuring
the new breakthrough
technology.
Canon has
developed
breakthrough
optical
design concept
using a
newly developed
optical
element
in the most
effective
way. We
have named
the new
design concept
the "Power
Optical
System"
which can
achieve
higher specifications
and quality
in smaller
size and
lighter
weight,
using the
new optical
"X-Element"
which realize
complete
elimination
of its aberration.