Pentax 6x7 Marine User manual

PENTAX
I SX7 I

CONTENTS
LENS MOUNTING AND REMOVAL ···································· ··············2- 3
LENS CARE .. ·· ....··· .... ··.... ·· ....·· .. ···· .. ··· ..·· .......................................· 4-5
DIAPHRAGM TYPES ....................................................................... 6-7
LENS HOODS ·· ....···· .. ···· .. ····· .. ·· ....·.... ·· .. ··· .. ····· .. ·.... ·· .. ···· .. · .. ·· ··.. · .. ··8- 9
FILTERS . .. ............. .. ....................................................... ··.. ·· ·· .. ·· 10-11
HANDLING UNMOUNTED LENSES .. ........ .. ..............· .. ·.............. .. · 12
TELEPHOTO SHOOTING .. ·.... ·· .. ···· .. ·· ·· .. ·....··.... ·· .. ·· ·· .. ·· .. ··· .. ·· .. ··· .. · .. ·· 13
INFRARED PHOTOGRAPHY ..··· .. ··· ·· .. ·· .. ·· .... ·· .... ·· .. ·· .... ·· ......··.... ·· .. · .. ·· 14
SUPER-MULTI-COATING ·....···· .. ·.... ·· .. ··· .. ···....·.... ·· .. ···· .. ·.... ·· .. ·.... ·· .... 15
TRIPOD MOUNTS jV ERTICAL SHOOTING WITH LONG
TELEPHOTOS ..····
.. ··· .. ····· .. ··· .. ····........ ·· .. ···......· .. ·.... ·· .. ·....·....· 16 -17
SIGHTING AND FOCUSING LONG TELEPHOTOS ...... .. ·..............· 18-19
SMC TAKUMAR 90mm F2 .S LEAF SHUTTER LENS ......·.............. 20 -21
SMC MACRO TAKUMAR 1 35mm F4 ..·.......................................· 22 - 23
SMC REFLEX TAKUMAR 1000mm FS ..........................·....·........· 24-25
TRUNK CASE ·· .. · .. · .. · .. · .. · .. ·· .... ·· ....·.... ·· .. ··· .. ·· .. · .. · .. ··· .... ·.... ·· .. · .. · ·· .. · .. ·· 26
INTERCHANGEABLE LENS ACCESSORIES ............·..................·........· 27
K & P MOUNT ADAPTORS/ 6 x 7 BODY .. .......... .. .. · .. .. ............ .. .......... 28
LENS SPECIFICATIONS .. ·· .... ·· .... ·· .. ··· .. ·· ....·· .. · .. ·..· .. .... .. ..·· .. ·....· .. ·· .. · ·29

67 INTERCHANGEABLE LENSES
PENTAX
Asahi Optical had its beginnings as a
lens maker and today
is the world 's only
leading lens maker manufacturing a large
format camera. All 67 interchangeable
lenses are computer-generation optics
designed in the Company's
own engin-
eering department, manufactured in its
own factories, and tested in its own labo-
ratories. Meticulous quality
control over
each step
of the manufacting process as-
sures maximum optical performance
with
every lens in the line.
67 lenses truly exist in a class of their
own. Giants in
terms of quality, precision
and
power , each features a precision ba-
yonet
mount which matches up with the
camera perfectly, and each up
through
800mm focal length offers fully automatic
diaphragm . In addition , each is of rugged
and durable construction
for years of .
reliable use.
They also incorporate a host
of ingenious features geared toward max-
imum operating ease.
Another outstanding feature of the 67
lenses is Super-Multi-Coating, Pentax's
own unique 7-layer coating process which
increases light transmission for brighter
and crisper images, and also minimizes
flare and
ghost images.
Please refer
to the sections of these
instructions concerning the lens
or lenses
you have purchased. Lenses
with com-
mon characteristics are listed
at the begin-
ning
of the various sections for con-
venient reference
as you thumb through
the manual. Sections where no listing is
given are general instructions
for all
lenses; there are also sections devoted
to special purpose lenses (see "Con-
tents").

-INNER BAYONET MOUNTING LENSES; _______ _
A
SMC FISH- EYE TAKUMAR
SMC PENTAX
SMC PENTAX
SMC
TAKUMAR
SMC PENTAX SHIFT
SMC
TAKUMAR
SMC PENTAX
SMC
TAKUMAR
SMC PENTAX
SMC
TAKUMAR
SMC TAKUMAR
SMC PENTAX
SMC PENTAX
M*ED (IF)
SMC MACRO TAKUMAR
35mmf / 4.5
45mmf / 4
55mmf / 4
75mmf / 4.5
75mmf / 4.5
90mmf /2. S
90mmf / 2.S
105mmf / 2.4
165mmf / 2.S
200mmf /4
300mmf /4
500mmf / 5.6
SOOmmf/ 6.7
135mmf /4
Lens
Removal: All these 67 lenses mount to
the inner bayonet of the Pentax 6 X 7 camera.
To remove the lens on the camera, press the
lens bayonet lock
as illustrated in Photo A and
turn the lens
to the left .
When the red
dot on the lens lines up with
the
dot on the camera mount, pull out to
remove the lens from the camera body.
Lens
Mounting : Align the red dot of the lens
with the red dot of the mount and insert the
bayonet tabs
as illustrated in Photo B. Turn
the lens
to the right until it locks in place with
a click.
Wiggl e the lens back and forth slightly
to test whether it is mounted properly.

OUTER BAYONET MOUNTING LENSES _______ _
SMC TAKUMAR
SMC TAKUMAR
SMC TAKUMAR
SMC REFLEX TAKUMAR
400mm F4
600mm F4
800mm F4
l000mm F8
All these 67 Lenses match with the outer
bayonet mount of the 6 x 7 camera.
To Mount: Loosen the fastener ring surround-
ing the lens mount and position it with the
white dot facing upward (Photo C). Then,
match the lens mount with the outer bayonet
mount of the camera, insert the bayonet tabs
and
turn the fastener ring to the ri ght as
illustrated in Photo D.
Note : Check that the lens is mounted securely
before
letting go . If the bayonet tabs have
not caught properly , the lens may fall off when
you let go

67 lenses are high precision optical in-
struments and should be treated accordingly .
Protect them from humidity , salt air and dust;
do not store them in damp places. It is good
practice to protect the lens with a filter when
using it near the seashore and other loca-
tions where dust or moisture might accumu-
late.
Cleaning: Do
not wipe the lens with a hand-
kerchief or other rough cloth which might
scratch the surface. Use only a rubber blower
or soft brushes especially designed for lens

cleaning for removing dust from the surface of
a lens. To remove most of the dust, wipe it
away or brush it away gently as shown in the
photo on the left .
If you should fingerprint a lens surface, or if
it is too dirty to clean with a blower, clean the
lens with either high-quality lens cleaning paper
or a very
soft cloth wrapped around the end
of a match stick, etc. The cloth or paper can
be dampened
with lens cleaning solution or
alcohol. Wipe gently with a circular motion
from the center outward . When cleaning
larger lenses,
wrap the paper or cloth directly
around your
finger to clean more effectively.
With extremely dirty lenses, shift the cloth or
paper frequently to avoid wiping the dirt back
onto the lens. A few wipes in this manner
should remove
most stains. If gentle cleaning
fails
to remove a stain, the lens should be
taken
into an authorized Pentax Service Center
for servicing.
Excessive heat,
dropping and scratches will
also damage lenses. Exercise care so
as not
to drop lenses and do not toss them around
carelessly. Always cover a lens
with both front
and rear caps when storing it away in its case
or bag.
When not using lenses regularly, especially
during humid weather, remove it
from its case
and check
for mildew. Dry out the case if
necessary. Light mildew can easily be wiped
off . If mildew has formed on the inside of the
lens, the lens may require repair.
5

_ AUTOMATIC DIAPHRAGM LENSES- _______ •
SMC FISH - EYE TAKUMAR
SMC PENTAX
SMC PENTAX
SMC TAKUMAR
SMC PENTAX SHIFT
SMC TAKUMAR
SMC PENTAX
SMC TAKUMAR
SMC PENTAX
SMC TAKUMAR
SMC TAKUMAR
SMC PENTAX
SMC PENTAX
M*ED (IF)
SMC MACRO TAKUMAR
35mmf /4.5
45mmf / 4
55mm fl 4
75mmf /4.5
75mmf / 4.5
90mmf /2. S
90mmf / 2.S
105mmf / 2.4
165mmf / 2.S
200mmf /4
300mmf / 4
500mmf / 5.6
SOOmmf/ 6.7
135mmf / 4
2.4 • 4 • 5.6 • 8 • 11 • 16 • 22
3. 44 .8 6. 7 9. 513 .5 19
All lenses listed in the chart above feature
automatic
diaphragms that operate In the
same manner . The automatic diaphragm
will function
normally as long as the AUTO/
MAN . lever is set to AUTO.
T
Q preview the depth of field or to release
the spring
for operating the diaphragm man-
ually, slide the lever
downward while pressing
on
the serrated top as shown in the photo on
the adjacent page.
When the lever catches

• MANUAL DIAPHRAGM LENSES -----------
it will lock on manual (MAN .). To re -engage
the automatic
diaphragm , press on the lever
again and let go so
that the lever returns to
the AUTO position.
MANUAL DIAPHRAGM LENSES
SMC TAKUMAR
SMC TAKUMAR
SMC TAKUMAR
400mm f/4
600mm f/4
800mm f/4
67 lenses from 400mm through 800mm
telephoto (except 500mm f / 5.6) feature a
manual
diaphragm which is stopped down by
rotating
the aperture ring to the various
click-stop f-
number settings. This method is
used
with all long telephoto lenses, except
the
1000mm reflex telephoto which does not
employ a diaphragm . When using manual
diaphragm lenses, focus
with the lens set at
maximum aperture, and
then stop it down to
shooting aperture just before tripping the
shutter.
Preset Diaphragm
The SMC Pentax 75mm shift lens features
a preset
diaphragm system, whereby the
shooting aperture is preset with a preset
ring,
so focusing and composition are per-
formed at full-aperture. Then, the aperture
is
stopped down for exposure metering and
shooting by turning the aperture ring until it
matches up with the preset ring, (Operating
details are given in
the instruction manual
furnished
with the lens.).

_ ACCESSORY LENS HOODS -----------IIIIII!
SMC PENTAX
SMC PENTAX
SMC TAKUMAR
SMC TAKUMAR
SMC PENTAX
SMC TAKUMAR
SMC MACRO TAKUMAR
45mmf / 4
55mmf / 4
75mmf / 4.5
90mmf /2 .B
90mmf / 2.B
1 05mmf /2 .4
135mmf / 4
Lens
hoods are available for the various
67 lenses. Certain hoods may be used
interchangeably , some fit only one lens, wh i le
others are built-in .
Screw-mount lens hoods : The 90mm and
105mm lenses take the same lens hood;
likewise, the
135mm and 150mm lenses.
In
both cases, after screwing the hood into
the threads at the front of the lens as far as
it will go, loosen it slightly so that the angle
of the hood is square with the camera body .
Spring - type hood: The lens hood for the
55mm f/ 4lens is a spring type which clips
to the front of the lens easily via two tabs.
Bayonet - mounting lens hood : The lens hood
of the 75mm f/ 4.5 lens attaches to the lens
via a
two tabbed bayonet fixture . Match up
the white dot on the lens hood with the
white dot on the lens barrel and turn the
hood to the right until it locks in place.

BUILT-IN LENS HOODS --------------
SMC PENTAX
SMC TAKUMAR
SMC TAKUMAR
SMC TAKUMAR
SMC PENTAX
SMC TAKUMAR
SMC PENTAX
M*ED(lF)
SMC TAKUMAR
SMC
REFLEX TAKUMAR
165mm f /2 .S
200mm f/4
300mm f/4
400mm f/4
500mm f/5.6
600mm f/4
800mmf /6.7
SOOmm f/4
l000mm f/S
Built-in lens hoods
Long telephoto 67 lenses feature built-in
lens
hoods . This feature is possible as the
narrow angle of view permits the use of built -
in
hoods without vignetting . The built-in hoods
on the above lenses are approximately the
same diameter as the lens barrel and are extre-
mely easy to use. They may be put into action
in an instant merely by extending them out
over the lens barrel as shown in the photo .
When not using a hood , simply slide it back
to its original position . Hoods will extend and
retract more smoothly if slightly rotated when
manipulated.
CAUTION
Built-in lens h oods cannot be employed wit h
the
165mm , 200mm and 300mm lenses w hen
the Gelatine Filt er Frame is being used. Lens
hood s for the 165mm and 200mm lenses also
ca nnot be extended when using a polarizing
filter . 9

_ ACCESSORY FILTERS _____________ •
Filters Attaching to the front of the lens
The 55mm f/4 lens uses 77mm screw-in
filters that fit the threads on the front of the
lens. In addition, the spring-type lens hood
for this lens may be attached over the filter .
The
75mm lens, the standard lens, and
telephoto lenses through 300mm focal length
accept bayonet
mounting filters of different
sizes. These filters attach to the front rim of
the lens via two bayonet tabs.
In
the case of the 90mm and 105mm lens,
as well as the 135mm and 150mm lenses,
the respective lens hood may be mounted
over the filter.
Except
for the polarizing filter , use of two
filters together is not recommended.
Filters Attaching to the Rear of the Lens
.Telephoto lenses from 400mm through
1000mm (except the 500mm lens) are de-
signed
to accept both 77mm 67 bayonet
filters and
77mm Pentax screw-in filters (SMC
Pentax
M* ED (F) 800mm f/ 6.7 via a filter
frame). Both types
mount to the rear of the
lens. Before
mounting either, the filter
adaptor ring which is housed in the lens
mount will

have to be unscrewed and removed (Photo
below left).
Bayonet mounting filters: Align the white dot
of the filter adaptor ring shown in the middle
photo with the dot on the filter and give the
filter a 11 6th turn to the right until it bayonets
in place.
Screw-in filters: Simply screw the
filter into the threads of the adapter ring.
After you have attached the filter to the
ring, screw the ring back into position at the
rear of the lens.
NOTE:
Slight focal adjustments may be re-
quired due
to the addition of the rear filter.
Built- in Filters
SMC Fish-Eye Takumar : The SMC Fish-Eye
Takumar
67 lens features four built-in filters
(UV, Y2,
02 and R2). The filter of your choice
may be
employed by turning the filter dial on
the front rim of the lens. Gelatine filters may
also be employed in conjunction with this lens
for additional filter applications. Cut gelatine
filters to the appropriate size and insert them
into the gelatine filter clip at the rear of the
lens.

Unmounted lenses wh ich have not been put
back
into their cases should be handled care-
fully. They should be placed on a level surface
to keep them from falling over or rolling away
and damaging the optical system.
Generally, smaller lenses should be
stood on
end
with the rear mount capped and facing
upwards as with the three lenses in the center
of the photo. Conversely, the SMC Fish-Eye
Takumar
35mm lens should stand on its rear
lens cap
to avoid scratching its proturding
front element. Long telephoto lenses with
12
tripod mounts should be placed lengthwise on
their side; these will topple if stood upright.
Out-
of-focus , blurred photographs are almost
always caused
by camera shake which results
from not holding the camera firmly enough.
This tendency is
more pronounced at slow
shutter speeds and with long 67 telephotos,
in particular"due
to their greater length and
forward center of gravity . Greater care is
needed with these lenses to aviod camera
shake.

The most effective method of minimizing
shake
with long telephotos is the use of a good ,
solid
tripod . Excellent results can be obtained
by handholding telephotos up
to 200mm if
held carefully.
Horizontal Handheld Shooting: Rest
the mount
section of the body and as much of the lens
as possible in the palm of your left hand with
fingers extended for operating the focus rin.g.
When you are ready
to release the shutter,
br ing both of your elbows in as closely as
possible against your body for firm support .
When handholding telephotos in excess of
300mm , stand with your legs spread as if you
were firing a pistol, and shoot at a slightly
leftward angle for added support .
Vertical Shooting with Telephotos:
Support
the lens with your left hand as shown in the
photo on the right below . Added support will
be given by holding the camera flat against
your forehead.
Handheld
telephoto shooting will require
some practice;
but perfect , blur-free shots are
possible in this manner wi
th up to 300mm
telephoto .

When infrared film is used, the focus of a lens
differs somewhat
from the norm, and varying degrees
of compensation are required which differ from lens
to lens. The depth-of -field scale of each 67 lens
includes
an infrared index mark for focusing with
infrared film.
When using infrared film, first , focus in the normal
manner; then, check the distance figure aligned
with
the standard index mark of the focusing ring. Com-
pensate
for infrared shooting by rotating the focus-
ing ring until this figure is realigned
with the infrared
index mark. For example,
if the distance scale is set
at
00 (infinity) turn the infinity mark so that it aligns
with the infrared index as shown in the illustration
above the photo.
• Always
use an R2 or an 02 filter for infrared
photography .
14

Before the 1970's, the use of multilayer lens coating
was limited mainly to laizers , window glass for space satel-
lites
and special optical equipment. In 1972, however,
Asahi Optical broke the barrier by marketing its first series
of
Super -Multi-Coated (SMC) lenses for use in photogra-
phicallenses. Since then, further refinements
have lead
to the application of Super-Multi-Coating to almost all lens
surfa ce s, mak i ng it the most thorough len s coating on any
camera len s to da y.
An uncoated lens has a glass -air interface reflection
ratio of about
5% of the incident light, which results in a
considerable
loss of lens speed . Single-layer coatings and
conventional
mUlti -coatings featuring two to three layers
further decrease this light
loss to between 1% and 2% as
indicated in the chart, Even at this level, however, with
multiple-element
lenses total light loss ranges between 10%
10%
and 20 %, which still results in low contrast and
permits a considerable amount
of flare.
Today's
SMC Takumar and SMC Pentax lenses feature
7 layers of Super-Multi-Coating
on most all elements inside
the
lens as well as out, and up to an amazing 99.8%
of the incident light-which means that the glass-air
interface reflection
has been reduced to an unprece-
dented 0.
2% . As a result, even the slightest reflections
are minimized. Contrast and resolution are increased to
give sharper images, while flare and ghost images have
been virtually eliminated. In addition, as reflection control
is almost flat against the entire range of visible light, color
fidelity
is improved remarkably, and the reproduction of
black tones, often a problem,
is strikingly successful.
Reflection Ratio
5.0
%
Uncoated Lenses
4.0 Refraction Ratio= 1.6
3.0
2.0
1.0
SMC
400 500
600
Wave Lengths (nm)
700
15

• TRIPOD MOUNTSjVERTICAL SHOOTING ______ ....
WITH LONG TELEPHOTOS
SMC TAKUMAR
SMC PENTAX
SMC TAKUMAR
SMC PENTAX M* ED (IF)
SMC TAKUMAR
SMC REFLEX TAKUMAR
400mm f/4
500mm f/5.6
600mm f/4
800mm f/ 6.7
800mm f/4
1
000mm f/8
CAUTION
With the exception of the 500mm f/5.6
lens
the tripod mounts of 67 lenses cannot
be removed
or rotated.
Tr
ipod Mounts : Long 67 telephoto lenses
are quite large and balance would be
poor if a
tripod were mounted only to the camera body,
this could also result in damage
to the camera.
Each
of the lenses listed on the left feature a
built-on
tripod mount in order to give the lens
added
support . As even the slightest move-
ment can cause blur with high-powered 67

telephoto lenses, a firm , sturdy tripod should
be used.
Blur
is most pronounced at shutter speeds
between 1/
60 and 1/4 sec. When using long
telephotos at these speeds, attach a
tripod
firmly to the tripod mount as shown in Photo
B.
Even better results will be assured if a
second
tripod is attached to the camera body.
6 x 7 cameras
with a mirror -lock feature
should be used
with the mirror locked up to
further reduce the possibility of blur.
Mounting the Camera Vertically: To shoot
with the camera in vertical position, slightly
loosen
the fastener ring shown in Photo C and
position it so
that the white dot is at a 90-
degree angle. Then, insert the lens mount into
the camera mount , making sure the bayonet
tabs insert
properly . Once inserted, tighten
the fastener ring by turning it to the left if you
are behind
the camera. Check that the bayonet
has locked
properly before letting go of the
camera (Photo D) .

. SIGHTING AND FOCUSING WITH _________ ~
LONG TELEPHOTOS
SMC PENTAX
SMC TAKUMAR
SMC PENTAX
M* ED (IF)
SMC TAKUMAR
SMC
REFLEX TAKUMAR
18
500mm f/5.6
600mm f/4
800mmf / 6.7
800mm f/4
l000mm f/8
Sighting: Most of the subjects shot with a
high-powered
telephoto lens are at great
distances
from the camera and are often dif-
ficult
to bring into the limited angle of view of
these lenses. Longer 67 telephotos are
equipped
with a sight, such as the one pictured
below, built onto the top of the lens barrel.
Using the
sight to locate distant subjects is
much easier than trying to sight them directly
with the viewfinder.
To use the sight , simply aim the lens at the
subject
as if you were pointing a rifle at a
target and place the subject in the sight. Then,
proceed by centering the subject in the finder.
The
sight is also useful for picking out moving