Subal ND750 User manual

USER MANUAL
NIKON ND750
housing

Dear customer,
It is my great honor and pleasure that you have chosen our product.
SUBAL, one of the oldest manufac- turers of underwater housings and
equipments, always trying to follow
new trends and to complement its
range of products. With our experi-
ence and knowledge, for almost four
decades, we cover with our quality
equipment all leading manufacturers of cameras and video
cameras. The result is that a large number of world-re-
nowned underwater photographers uses SUBAL equipment.
I
hope that you will take some of the memorable moments
with your SUBAL!
CEO Subal
Karl Harald

4
We congratulate you on your choice of the SUBAL ND750 underwater
housing for the Nikon D750.
During the conception and design of the housing, considerable attention
was directed towards the application of advantages and unique features of the
state-of-the art D750 camera technology, making them available to the under-
water photographer for the rst time.
An extensive range of high quality lens ports allows the tting of a num-
ber of interesting lenses, which is a great advantage over all other amphibi-
ous cameras available today. This will facilitate the most varied photographic
tasks.
To get the best results, to take full advantage of the system and for the pro-
tection of your camera, we recommend you take careful note of all the hints
contained in these instructions for use.
We hope you enjoy using the SUBAL ND750!
GENERAL
It will be assumed that the user of the camera is fully condent and
trained in the use of diving equipment.
The demands on underwater photographic equipment are very high - pres-
sure, aggressiveness of salt water and not least, improper use results in a risk
which can only be avoided by careful handling.
Therefore assemble carefully and calmly. Check twice!
During the production process all functions and the tightness of each indi-
vidual housing are tested and checked several times. Nevertheless, we recom-
mend to test dive the housing rst without the camera tted, to ensure that
all is well.
After closing the housing, check everything as recommended on the check-
list.
After entering the water, tip the housing with the frontglass downwards and
check whether everything is watertight. Then you can dive with condence.
If the equipment has not been used for a prolonged period or perhaps after
a service (i.e a. greasing of the shafts, etc.) always test dive rst without the
camera tted.
CONTENTS
GENERAL 5
USE AND MAINTAINANCE OF O-RINGS 6
PREPARING THE CAMERA 7
PREPARING THE LENS 8
OPENING THE HOUSING 9
CLOSING THE HOUSING 10
INSERTING THE CAMERA 10
THE INTERCHANGEABLE PORT SYSTEM 13
CHANGING A LENS 14
OPERATING THE FUNCTIONS 15
MOUNTING AND CONNECTING A FLASH UNIT 16
SUBAL CIRCUIT FOR NIKON AND CANON
(CONNECTION DIAGRAM) 17
CHECK-LIST 18
GUARANTEE 19
FRONT HOUSING PART EXPLODE VIEW 21
FRONT PARTS LIST 23
BACK HOUSING PART EXPLODE VIEW 25
BACK PARTS LIST 27

6
Please take note of these points of advice:
• O-rings should be absolutely clean and be greased thinly. We recommend
the use of waterproof Silicone grease (eg. SUBAL-Silicone grease). Too
much grease results in the accumulation of small dirt particles which are
invisible.
• The sealing surfaces must be absolutely clean.
• O-rings must lie in the groove without twisting.
The equipment should be rinsed thoroughly in freshwater after each dive
in saltwater. Metal parts, especially threads (screws) should always be
greased.
Threaded parts should never be stored assembled without rst having
been cleaned and dried.
Salt residue should be removed before prolonged storage by placing in
freshwater for several days, then dried.
The O-ring of the lid and especially also the front port O-ring should be
removed.
Only use original SUBAL-spare parts and SUBAL-accessories.
Have your equipment overhauled from time to time by the manufacturer
or by an authorized service center - it is worthwhile.
USE AND MAINTAINANCE OF O-RINGS
SUBAL housings are designed to use specially formulated O-rings. Replace-
ment by other than genuine SUBAL O-rings may result in leakage. Therefore:
Use original subal O-rings only!
The most care is needed with the body O-ring and the port O-ring. Ensure
that the O-rings have no mechanical damage like cuts or at spots. If so, re-
place them immediately.
Stretching the O-ring a little and feeling it as you slide it between your
ngers is a good way of detecting abnormalities.
When closing the housing or changing the port, care should be taken that
the sealing surfaces on the housing, the O-ring grooves of the housing and the
port and the O-ring itself are absolutely clean.
Remove all dirt particles carefully to prevent water entry.
The sealing surface and the O-ring should be thinly greased with Silicone
grease. This reduces friction and abrasion and allows the O-ring to settle into
place easily.
Do not use too much grease. Undetected dirt particles could accumulate
and would lead to water entry. Take a little bit of grease on two ngers and pull
the O-ring between these ngers until it is greased all around. Wipe off excess.
The O-ring should just have a sheen.
Never use hard or sharp metal tools for putting in or removing the
O-rings. You could permanently damage the sealing surface or the
O-ring itself.
When inserting the O-ring take care that it is not twisted or is lying undulat-
ing in the groove.
The useful life of O-rings is limited in duration depending on care, fre-
quency of use and storage conditions. It is absolutely essential to change them
regularly.
Please note that the especially soft quality of the original SUBAL O-ring ma-
terial looses elasticity prematurely if it is permanently compressed. So, if you
plan not to use your housing for a long time, remove the O-ring and store it in
a cool place without deformation.
PREPARING THE CAMERA
There is nothing to change on your Nikon D750 for the use with SUBAL
ND750.
Knowledge and familiarization with the functions of your camera is essen-
tial to avoid mistakes when installing and using the camera. We recommend
you study your camera manual thoroughly before installing the camera.
Mounting the Camera Support Saddle
Turn the AF-M switch to AF position (Fig. 1). Attach the camera support
saddle to the camera base with the locking lever pointing to the camera back-
side. Check that claw on camera support saddle didn’t change position of the
AF-M switch (Fig. 2). Tighten the camera screw by using a coin or a screw driver
without excessive force.
Remove the plastic protector of the camera’s monitor!

8
PREPARING THE LENS
To change the focal length on zoom lenses, or for manual focusing with xed
focal length lenses, special lens gears are required which need to be tted to
the lens barrels.
The SUBAL ND750 accepts gears with 88 teeth only!
Mounting the gear rings
Zooming gear ring – Please use only gears with 88 teeth!
Depending on the type of the lens, the zooming gear ring is tted onto the
lens either from the front or from the rear.
Set the zooming barrel of the lens to the mid point of the zoom range.
After noting where the zoom drive gear of the housing is located, position the
zooming gear ring on the lens in such a way that when the lens is mounted on
the camera the centre of the toothed section of the zoom gear aligns with
the zoom drive gear in the housing. Check that the gears can mesh over the
full zoom range of the lens. A nal check should be made after the camera is
inserted into the housing.
If the zooming gear ring provides marking dots t the zooming gear ring
on the lens in such a way that the markings correspond with the range of the
zoom scale.
Tighten the Nylon screws (if provided) to t the zooming gear rmly but
take care that the free-turning of the zooming ring of the lens is maintained.
Focus gear rings
The different construction of lenses requires different mounting systems of
focus gear rings.
Therefore installation procedures vary. Please follow the mounting instruc-
tions enclosed with the focus gear ring.
NIKON AF-Macro Objektive 60/2.8D and 105/2.8D
These lenses can be used in manual focus mode with special SUBAL focus-
ports only. With this ports the lenses can be switched between AF and MF!
OPENING THE HOUSING
It is recommended to rinse the housing with fresh water and dry before
opening.
When rinsing the housing make sure the port is attached properly and ash
sockets are sealed with plugs if no strobes are tted.
The SUBAL Quicklock System locking levers are spring-loaded and require
that they be depressed before rotating.
Do not forcefully turn the levers otherwise damage could occur.
Place the housing on a at supporting surface with the front surface of the
port downwards. Push in the locking levers rmly in the rotating centre (head
of the screws) and turn them outwards (Fig. 3 & 4).
Lift the lid slowly and carefully to avoid water drips onto the camera.
Now upright the housing and pull out the camera a little bit to enable you
to remove the hotshoe connector if provided. Remove the camera.
Fig. 1 Fig. 2
Fig. 3 Fig. 4

10
Some big lenses have to be removed before the camera can be pulled out
of the housing.
CLOSING THE HOUSING
After checking the body O-ring is
clean, lubricated and properly seat-
ed in the groove, and the lid sealing
surface is also clean and free from
any scratches or damage, the hot-
shoe connector – if provided - is con-
nected properly and all functions are
working, the housing lid is put on.
The locking levers have to point out-
wards (Fig. 5).
Check now whether the lid ts correctly and whether the gap between
the lid and the front part seems equally spaced all around!
If the lid is lifted again after it was put on, the O-ring might be stuck on
the lid and slide out of the groove.
Push in the locking levers rmly in the rotating center (head of the screw)
and turn them inwards a quarter of a turn until they click into place, locking
them.
The locking levers must be well greased periodically (inside, on the seal-
ing surface area).
Check once again if the gap seems equally spaced all around!
INSERTING THE CAMERA
In order to facilitate the tting of the camera into the housing, please take
note for the following hints.
Open the housing as mentioned above and place the synch cable (hot shoe
connector) over the edge of the housing, pointing outwards (Fig. 6 & 7).
Turn the power ON/OFF switch on camera and housing to ON position (Fig.
8 & 9).
Turn the focus lever to AF position (Fig. 10).
Put the housing on the front of the port. Take the camera and align the sup-
port saddle with the mounting rails inside the housing. Slide the camera into
the housing on the mounting rails. Lock the camera support saddle with the
locking latch (Fig. 11).
Fig. 5
Fig. 6 Fig. 7
Fig. 8 Fig. 9
Fig. 10 Fig. 11

12
Insert the synch cord connector in the direction indicated by the arrow on
the top of the connector into the camera hot shoe (the cable pointing into the
housing) (Fig. 12 & 13).
THE INTERCHANGEABLE PORT SYSTEM
For your SUBAL housing, there is a wide range of front ports available, the
largest of all manufacturers. This allows you the use of a multitude of regular
lenses under water, ranging from sheye lenses, extreme wide angle-lenses,
zooming lenses and macro lenses up to the 200 mm lens.
The port O-ring
Please pay attention to all that is
advised in chapter Use and maintain-
ance of O-rings.
Be sure that the O-ring and the
sealing surfaces are clean and lightly
lubricated.
The SUBAL ND750 with port size 4
provides a port locking system (not avail-
able on housings with port size 3! ). Turn
this lever downwards to release the port
lock. After mounting the port turn the
lever back to the Lock position (Fig. 17).
Inserting of the frontport
SUBAL-frontports are attached to the housing by a bayonet mount.
Insert the port (after checking as described above) into the housings bayo-
net with the white dot or the SUBAL-logo pointing towards the front main dial
control knob.
When pushed in, turn the port 90° clockwise until it stops. If properly
installed, the white dot or the SUBAL-logo is aligned with the middle of the
housing.
After installing check thoroughly that the O-ring is seated correctly in its
groove and does not protrude from the housing.
To remove the port turn counter-clockwise until it stops and then turn back
a little bit.
Do not change the port if it is very warm (eg. through irradiation from the
sun, etc.)!
Check if it works properly. If not, just
pull it out again and try once more.
Before closing the housing please
take care for the following points:
The LOCK switch must be NOT ac-
tivated (Fig. 14).
The switch “Photo/Video” have to
be in the same position on the camera
and housing lid (Fig. 15 & 16). Other-
wise this function is not available.
Fig. 12 Fig. 13
Fig. 14
Fig. 15 Fig. 16
Fig. 17

14
Synthetic material from which the ports are made expand more than the
aluminium housing body and may therefore jam in the mounting.
When travelling by aircraft the frontport should be left mounted to the
housing ONLY if the port O-ring and/or the body O-ring is removed.
Cleaning the front glass
The front glass of the ports are to be cleaned carefully to avoid scratches.
If possible, rinse well in freshwater, let it drip off and dry carefully with a soft
cloth. Dried lime/salt spots are very hard to remove!
Faint scratches are lled in by the water and stay invisible but with greater
damage, it may be necessary to replace the front glass.
Domeports
Domeports are ports with a curved front glass. They are mainly used with
wide angle lenses to keep the same angle of coverage under water as on land.
When using domeports for wide angle lenses, please note the following:
• Dome glasses act in water like lenses, creating an apparent image of the
actual subject, which is smaller and closer than in reality.
• The lens must be focused on this virtual image.
• The required adjustment of the lens is in the region of 0.15 to 0.3 m, de-
pending on the curvature of the dome.
• A dioptre lens on the camera lens restores the full focusing range under
water.
• The required power of the dioptre lens depends on the lens type and the
type of the domeport. Without these correcting lenses you may not even
be able to get your subject in focus!
• The fogging of the front glasses can be avoided by inserting Silicagel or by
applying an antifogging liquid.
CHANGING A LENS
SUBAL ND750 allows changing the lens without camera removal.
• Unlock the Port Lock (if tted).
• Remove the frontport.
• Turn the lens release knob clockwise approx. one quarter turn and push it
down to release the lens lock mechanism.
• Hold it in position and turn the lens clockwise to remove it.
• Leave the lens release knob, put the new lens onto the camera and attach
the proper port.
OPERATING THE FUNCTIONS
The operation of the camera functions is the same as for surface use: By
pressing the corresponding levers, push buttons or turning of the knobs.
If illumination of the subject is insufcient to guarantee proper autofocus
operation, additional lighting has to be used (pilot light of ash unit, etc.) or
the camera has to be switched over to manual focus.
Therefore a focus gear is required (not possible with all lenses).
Autofocus mode
Switch the Focus Mode Selector to AF (see camera manual). Lenses with an
M - A switch ring have to be set to A.
In order to avoid straining the focus motor of the camera, the lens focus
gear ring (if tted) needs to be decoupled. Turn the focus coupler lever
(below the focus knob) to AF.
This is not necessary if there is no focus gear on the lens.
If the subject in the picture is out of focus, there are a number of methods
available for restoring sharpness:
• Adjust the focus by pressing the shutter release lever slightly until AF
activates, keep it half pressed while you compose the picture and shoot.
• Adjust the focus by pressing down the shutter release lever slightly until
AF activates. Now press the AF-lock lever (the shutter release lever now
can be left) and keep it pressed until you have chosen the wanted frame
and have shot your photo.
• Choose the point of autofocusing with the Focus Area Selector.
Manual focusing operation
To adjust focus manually (not possible with all lens ports) a focus gear ring
on the lens is required.

16
Please note the mounting instructions enclosed with the focus gear ring.
The crown wheel inside the housing and the focus gear on the lens have to
mesh. Therefore the coupler lever has to be turned to MF and the focus mode
selector switch (M-S-C) has to be set to M.
Lenses providing an M - A switch ring have to be set to M before inserting
into the housing.
The AF-Micro Nikkor 60/2.8 and 105/2.8 lenses can be changed from AF to
MF even under water by the use of the special SUBAL Focus Control Ports.
MOUNTING AND CONNECTING A FLASH UNIT
The SUBAL ND750 is equipped
with 2 ports to connect Sea&Sea -
ber optic cables. Adapters for other
systems (e. g. INON) are available as
accessories (Fig. 18).
Modern strobes with STTL func-
tion provide full TTL control!
Optionally a built in ash elec-
tronic with up to max. 3 strobe sock-
ets is available. This can be upgraded
by your local dealer.
If you use your strobes via STTL (Strobe TTL) – connected to the sync ports
– the built in strobe of the camera has to be popped up. This will be provided
by a push button at the left upper side of the housing. To switch off the in-
ternal strobe turn the pear-shaped lever to the left upper side of the housing
downwards.
A wide range of perfected strobearms are available for the combination of
a SUBAL ND750 housing with SUBAL ash housings and strobes of many manu-
facturers.
The arms are fastened by pushing them onto an adapter plate on the up-
per part of the housing. The swivel arm is secured by screwing the footscrew
into the center indentation of the adapter plate. For handheld ash operation
(point and shooting), the screw needs only to be unscrewed a little and the
ash unit removed fortlessly and quickly and can be freely guided.
For other ash arms (eg. Nikonos, Sea & Sea etc.) adapters are available
which allow the mounting of the corresponding swivel arms by use of trays
(please see accessories).
When inserting the ash unit plug, please take care:
• The socket must be free of dirt, sand and moisture.
• The plug O-ring, too, has to be checked carefully for cleanliness and
should be lightly greased.
• Note the position of the indexing key and groove and push the plug into
the socket without using force, to avoid damage to the contact pins.
• The plug should be pushed in a few millimeters into the socket by hand
and only then the knurled screw screwed into the socket and slightly
tightened.
In order to guarantee proper ash control, the contacts should be carefully
protected from oxidation.
When removing the ash unit from the camera housing, proceed as follows:
While removing the knurled screw, hold the equipment in such a way that
the socket and plug point downwards. This allows the water which is in front
of the O-ring to drip off. Then pull the plug out slowly, so that the suction ef-
fect is as light as possible and no water gets into the contacts. If water has
penetrated, it has to be removed by blowing it out and drying. Contact prepa-
rations (sprays) are recommended from time to time.
SUBAL TTL-cables have a triple sealed, Nikonos-compatible plug, which pre-
vents water penetrating into the thread of the socket.
The socket is not waterproof with the plug removed.
The red blanking plug must be screwed into the socket(s) if the housing is
used without ash unit(s).
SUBAL CIRCUIT FOR NIKON AND CANON
(CONNECTION DIAGRAM)
CAUTION!
TTL-contacts must be used for digital NIKON or CANON strobes or other
with NIKON or CANON cameras compatible digital strobes only!
Using NON digital strobes with the TTL contacts may damage the electron-
ics of the camera!
Please contact the producer of your strobe!
Fig. 12
Fig. 18

18
CHECK-LIST
• After ensuring that the main O-ring has been installed and the housing
closed properly, please check carefully ONCE AGAIN, whether:
• The gap between the housing front and the lid seems equally spaced
all around.
• The gap between the housing front and the port seems equally spaced
all around and the O-ring has not been squeezed out.
• The shutter release lever works easily.
• All functions work properly.
• The ash plug(s) are plugged in correctly and tightened and the outside
O-ring has not been squeezed out.
• If no ash is used the red plugs must be screwed in.
• The lens cap is removed from the camera lens.
• The frontglass of the port is clean, inside & out.
GUARANTEE
Duration of guarantee:
SUBAL ND750 underwater housings are guaranteed against defects in mate-
rial or workmanship for two full years from date of purchase for consumer use.
Housings used commercially are guaranteed for 90 days. The invoice or receipt
is valid as guarantee certicate. Keep it safe.
Conditions of warranty:
The guarantee extends without exception to the rectication of material
and production faults of goods manufactured by SUBAL Austria. Faulty parts
are exchanged or repaired at the option of the manufacturer. No further claim
is possible. Pre-requisite for the right to claim is impeccable care and use of
the unit.
No guarantee claim will be accepted without the prior consultation and
authorisation of the manufacturer and must be returned freight paid. The
guarantee is void after intervention, repair or modication by non authorised
persons.
In order to check for transport damage, we recommend that newly deliv-
ered units be water tested without the camera or ash unit tted.
Repairs:
The unit must be returned freight prepaid to SUBAL Austria or any other
SUBAL partner.
Flash 2 (right side) Manual
Flash 2 (right side) TTL
Flash 1 (left side) TTL Hot Shoe
Flash 1 (left side) Manual
Hot ShoeFlash 1 (left side) Manual