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4. OPERATING INSTRUCTIONS
(1) Correct Method of Handling
a Long Telephoto Lens and
Using It with a Tripod.
Compared with t elephoto lenses
normal-
ly used (i
.e.
135 to 300mm ). the
angle
of
view of your
lens is
considerably
nar-
rower, which can possibly
cause
"
camera
shake"
problem
s
when the shutter is
re
leased.
The
refore,
taking tids into
can·
sideration,
follow the recommendations
as
desc ribed
be low when
you use the
lens.
a.
Hand·Hold Photography
H
o
ld th
e focus ing
ring
of
th
e lens
with
your
left
hand. Draw the
came ra
near
and hold
it
firmly
against
your face
w
ith
left
hand
.
I
f
y
ou
wear
glasses,
fix
the
viewfinder frame
securely
against
the
glasses.
The slowest
shutter
speed which
permits
hand·held
shots is
normally
can·
sidered to be 1/focal length
of the
lens.
Therefore, wi
t
h your lens.
it
is
recom-
mended that
you use ·a shutter
speed
of
1/500
second or faste
r
,
h
owever,
de-
pending upon
the
extent
of your
prof
i·
ciency
in
hand-held
photography
w
ith
a
long
telephoto
lens,
shutter
speeds
slower
than
1/500
second
may
also
be
used.
b.
With Tripod
:
I
t
is
recommended
t
o
u
se
heavy
duty
tripod
when
using
a long
telephoto
lens.
A lso
use
cab le release
for
shutter
releas-
ing.
(2) Focusing
I.
While
lookin
g through
your
c&mera
's
viewf inder, tu
rn
the
focus
ing r
ing
until
you
see
a sharp image.
If your
camera
accepts
different
focus
ing
screens,
then
it
is
advisable to
use
a
matte-fresnel
sc reen. This type of scree
n
is normally
recommended for ultra-telephoto
lenses
and
it
wi
ll
make focusing
easier.
Note
:
Since your
mirror lens
is an
ultra·
telephoto lens,
th
e
position
of the
dis·
tan
ce sca le index
and infinity mark
are
10
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