This lens
offers an
angle-of-view
coverage
between 93
and 65
degrees
(equivalent
to
approximately
20mm to 35mm
in focal
length in
the 35mm
format) and
is the
widest
medium-format
SLR zoom
lenses
available on
the market
today.
Equivalent
to three uni-focal
lenses -
35mm, 45mm
and 55mm -
it
eliminates
the time and
trouble of
lens
changes.
Thanks to
its
outstanding
maneuverability,
exceptional
optical
performance
and unique
ultra-wide-angle
coverage,
this zoom
lens expands
the world of
medium-format
photography
beyond
previous
boundaries.
Consisting
of eleven
elements in
eight
groups, the
optical
system of
this zoom
lens
incorporates
a hybrid
aspherical
lens
element, as
well as a
glass-molded
aspherical
lens element
to produce a
brilliant,
high-contrast
image over
the entire
image field
with minimal
aberrations,
field
curvature or
distortion.
Pentax's
original
three-group
floating
zoom
mechanism
further
contributes
to the
reduction of
curvature of
the field
throughout
the zoom
range, while
the special
ghost-less
coating
improves the
sharpness
and contrast
of images
even under
backlighting
conditions.
This zoom
lens also
features a
minimum
focusing
distance of
1.3 feet
(0.4 meters)
at all focal
lengths and
a maximum
magnification
of 0.21
times at the
55mm
setting, as
well as a
single-action
manual-focus/autofocus
switching
system. Its
large,
flower-shaped
lens hood
not only
shields
excessive
light
effectively
at all focal
lengths, but
also comes
equipped
with a PL
filter
window that
allows for
easy control
of a
polarizing
filter. |
| Construction |
8 Groups/ 11
Elements |
| Angle of
view |
93 - 65° |
| F stop range |
f/4.5-32 |
| Closest
Focusing
Distance |
1.3 ft.
(0.4m) |
| Maximum
Magnification |
1:4.7 |
| Filter Size |
82mm |
| Dimensions
(Length x
Diameter) |
4.1" x 3.5"
(104mm x
88mm) |
| Weight |
20.6 oz.
(585g) |
| Notes |
Shutter:
Focal plane
shutter
built-in to
camera body,
1/1000 to 30
sec and
bulb.
Diaphragm:
Fully
Automatic
Photometric
Method: TTL
open-aperture
metering |
|
|
|
