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13
OPERATING INSTRUCTIONS
(5) Installing
Filters
Your
mirror
lens
accepts 30.5mm
rear
screw-in
filters.
Since
the
focusing
system of the lens
is
precisely adjusted
with
a
filter
fitted,
you
must
use
a filter
at all
times
to obtain the optimum per·
formance.
For this
reason,
a
normal
(general purpose) filter is
fitted to
your
lens
at the
factory.
A set consisting of
ND4X. Y52.
056 and R60
filters is
available
as an optional extra.
ND2X
and
81 B
filters
are also available separately.
I
n
order
to
remove
a fil ter
it
should
be
unscrewed by turning
it
anticlockwise.
To
fit another filter simply screw it on
clockwise making sure it
is not
over-
tightened as otherwise
it
may be
dif-
fieu I
t
to
remove. When you wish to
replace
filters.
it is
easier if the custom
mount is
removed
from the lens.
I t
is
best
to use filters which have been
precision engineered for ultra tele photo
lenses and hence th is is the reason the
above mentioned
filters are available.
You
should always hold the filter by
its rim and
not
by the glass surface
because finger prints, etc. can
damage
the
quality
of your pictures and possibly
damage the filter coating.
(6) Mountinq and Removing
The Tripod Ring
(1)
For 500mm lan,
The tripod
ring can be mounted or
re
o
moved as shown
in photo (,A
)
by
tighten
·
Ing
or
loosening the
two
tripod ring
mounting
screws.
In
addition,
by loosen-
ing
the
tripod fastening
screw
provided
on one side of
the ring, you
can se lect
any
posi
t
ion within
360
0
,
thus
com·
manding free
camera
movement,
~hori·
zontally or vertical
ly. When you are
mounting your
camera
and lens
on a
tripod, you
shou
ld
always
use the tr ipod
mounting ring
and
not the t
r
ipod socket
on
your
camera
because the tr ipod ring
will
provide you
with
maximum stabil
i
ty
and convenience.
Note
:
The tripod mounting
r
ing
should
be fitted
with
the fastening
screw
near
to the
back
of
the lens
as
otherwise the
ring
may
fou
l
th~
camera body.
When
mounting
the lens on a tripod. do
not
tighten the fastening screw
of
the
tripod's
universal head
excessively-as
otherwise
the fastening screw may
come
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