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ES
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confinued
Uw-Nikkor
'l5mm
f
/2.8N,
Uw-Nikkor
20
mm
t12.8, ond
Uw-Nikkor
28 mm
f
/3.5
Designed
exclusively
for underwater
use,
these
UW-Nikkor
lenses
can
be used
to a depth
oJ 50mm
(toOtt).
The
optics
are
corrected
exclusively
for
underwater
aberrations
and
provide
excellent
under-
water
photographs.
Also,
Nikon
Integrated
Coating
(rutC)
is applied
to internal
air-to-glass
surfaces
to
minimize
ghost
images
and
flare. For each
lens, an
optional
optical
viewf
inder
is
available
for
quick
deter-
mination
of
field of
view.
Main
Specifications
UW-Nikkorl5mm
fr2.8N
Lens construction:
12
elements
in 9
groups
(including
watertight
f ront cover
glass)
94'(underwater)
Graduated
in
meters and
feet
f rom
0.3m
(t
ft)to
intinity
(oo)with
secondary
scales
f rom 0.22to 0.25
m
(o.z
to o.gtt)
Aperturescale:
tl2.8toIl22
Attachment
size:
87
mm
(P
=
0.75
mm)
Dimensions:
Approx. 93
mm dia
x 90.6
mm long
(overall)
Weight:
APProx.6659
68
Picture angle:
Distance
scale:
UW-Nikkor
20mm
112.8
Lens construction:
9
elements
in 7
groups
Picture angle:
78o
(underwater)
Distance
scale: Graduated
in meters and
f eet
f rom
0.4
m
(t.gtt)to
rnf
inity
(o)
Aperture scale:
f
12.81o1122
Attachment size:
67
mm
(P
=
0.75mm)
Dimensions:
Approx.
70 mm dia.
x 74
mm long
(overall)
Weight:
Approx.3509
UW-Nikkor
28mm
l/3.5
Lens
construction:
6 elements
in
5
groups
Picture angle:
59"
(underwater)
Distance scale:
Graduated
in
meters
and
feet f rom 0.6m
lztt)
to
infinity
(e)
Aperture scale:
113.5IoIl22
:
Attachment
size:
58
mm
(P
=
0.75
mm)
Dimensions:
Approx.
62mm dia.
x
43.8mm
long
Weight:
(overall)
Approx
1759