Underwater housing maintenance
Maintenance is one of the duties that almost every underwater photographer wishes they didn’t have to do. However, it’s the very people that don’t do it that are the ones that will sooner or later suffer a problem with their equipment.
If done correctly maintenance is just a minor inconvenience before or after a dive, but if ignored it can lead to a catastrophic flood. Housing floods, for those readers that haven’t suffered one yet, are what turns the most positive thinking underwater photographer, into a dribbling, incoherent state of depression.
You’ve probably seen one of these flood victims on at least one of your previous dive trips. It’s that person sitting in the corner nursing a salty camera and mumbling about ‘O’ rings to anyone that comes within earshot. Everyone avoids that person, and with good reason; as the latest studies clearly show that camera floods are highly contagious.
So what can you do to increase the life of your housing and minimize the chance of becoming another flood victim?
By following these simple maintenance steps you will go a long-way towards extending the life of your housing and preventing a lethal dose of this deadly disease.
Housing Maintenance falls into three distinct categories:
1. Pre-Dive Maintenance involves small checks and cleaning prior to a dive. These are simple, easy to conduct procedures that are carried-out while you assemble your camera equipment. It will probably take between 1-5 minutes depending on the complexity of your equipment.
2. Post-Dive Maintenance is carried-out while stripping down your camera gear for storage, usually once you are at home, and will take between 5-10 minutes.
3. Long Term Maintenance is usually carried out annually or bi-annually and is best carried-out by the equipment manufacturer or their service agent.
• If you are in a hot humid country, try to assemble your camera/housing in an air conditioned room, preferably with the camera removed from the housing overnight and the housing kept open overnight. This way both the camera and housing are in the driest (least humid) condition when being assembled. Don’t take the camera or housing outside until it’s fully assembled, as the camera will fog-up almost immediately upon exposure to the warmer/humid air outside of the air conditioned room.
• If you are in a cooler/dryer climate, then assemble your camera & housing inside, away from dust and sand.
• For most housings, the Main Body (rear door) ‘O’ Ring should already be removed from your housing (see Post Dive Maintenance below). If it isn’t, then remove it now for cleaning, prior to assembly.
• Clean the ‘O’ Ring groove in the housing rear door and in the front port (if fitted with a removable port) by wiping it with a piece of clean tissue paper, lens paper or microfiber cloth. Push the tissue into the groove, so it forms the square shape of the groove.
Now, in one continuous motion, wipe around the entire groove until the entire circumference has been wiped.
Remove the tissue and check for any pieces of tissue that may have remained in the groove. Also look for dust particles, hair, or any other foreign material that may interfere with the ‘O’ Ring sealing.
• Give the ‘O’ ring (or ‘O’ rings if there are more than one) a wipe with another clean tissue. Don’t stretch the ‘O’ Ring, just wipe it to make sure no large particles, hairs or other foreign material are stuck to it.
• Apply a small amount of the ‘O’ ring grease supplied with your housing to the main body ‘O’ ring(s). Use just enough grease to make the ‘O’ ring(s) shiny – NOT so much that there are visible lumps of grease – It is possible to over-grease the O-ring!
At the same time you are applying the ‘O’ Ring grease, feel the ‘O’ Ring for nicks, cuts or sand particles. It’s amazing how much your fingers can feel when lubing the ‘O’ Ring. If you feel any imperfections, check them out with a magnifier before installing the ‘O’ Ring. If in doubt replace it first-- ‘O’ Rings are very cheap in comparison to flooded cameras or strobes!
• Install the camera in the housing, checking that it is seated correctly.
• If your camera set-up uses the camera’s internal flash for lighting or if it uses the camera’s internal flash to fire an external strobe, then you need to install a Desiccant Pack inside of the housing before closing it.
• Make sure the Desiccant Pack is not interfering with the ‘O’ ring sealing surface as you close the back of the housing. Also ensure that it is not stopping the camera from seating correctly in the housing, as this may stop the housing rear door from closing tightly.
With clear acrylic housings you can visually check that the ‘O’ Ring is seated correctly in the groove by looking through the side of the housing BEFORE entering the water. The ‘O’ Ring should contact the housing evenly over its entire circumference – it appears slightly darker where it is sealing. Most leaks are caused by the ‘O’ ring not being seated correctly or dirt in the ‘O’ ring groove.
• You are now ready to assemble strobes. These are treated the same way as the camera housing: clean the ‘O’ Ring groove, clean the ‘O’ Ring, lubricate the ‘O’ Ring lightly, and install the ‘O’ Ring. Install batteries, ensuring correct polarity (+ positive and – negative). Test that the strobe ready light is operating before connecting to the housing.
• If you use external strobes you will now be fitting your base plate and strobe arms. Test fire the camera before entering the water, this ensures that everything is functioning correctly.
• Now you are ready to enter the water. Keep an eye on the housing when first entering the water and descending. Most leaks occur within the first few meters and you may be able to save the camera if you see a leak early enough.
• Rinse your camera in fresh water upon surfacing from each dive. If there is no rinse tank on a boat, or you are shore diving with no rinse tank, bring along an old towel that can be dunked in the seawater. Then between dives, wrap your housing in the towel and keep it out of the sun in order to keep the housing cool and damp. This will prevent salt from drying-out and crystallizing on housing controls, which damages the ‘O’ Rings the next time you press a button and can cause a flood.
• Make sure your camera equipment is not in the dive boat rinse tank along with Harry Heavy-Hand’s half-ton alloy housing with 4 strobes attached, squashing your pocket sized compact camera underneath it. Most dive boats have a Harry Heavy-Hands onboard!
• When you are finished diving for the day, give your housing another good rinse. Preferably leave it to soak for as long as possible. Operate each of the control buttons dials switches while in the freshwater. This will help dissolve any salt crystals inside the control button shafts and other areas. Remember to not leave your housing in a public rinse bucket, as other cameras may knock it around and break the seal.
• If you are not going to dive with the housing for a week or more then an additional step of simple maintenance is to lubricate each control button and dial shaft with one drop of SiliconPump (available from your dive store or visit www.mcnett.com). Please confirm with your housing manufacturer or retailer that this is safe for your particular brand of housing.
Each control on most acrylic (clear) compact & DSLR camera housings has a small slot that allows water to drain from the shaft and ‘O’ Ring. By blowing (with your breath) into this slot (or close to it), any water left after rinsing will be expelled. With many alloy DSLR housings there is no slot for water drainage, but by blowing (with your breath) close to one side of the control, excess water will still be expelled.
Then using a small eye dropper one drop of the Silicon Pump liquid can be dropped down into this slot, or run-down the shaft, lubricating the ‘O’ Ring and control shaft.
This Silicon Pump is harmless to the black (butyl) ‘O’ Rings used on nearly all camera housings. This includes all acrylic (clear plastic) and alloy compact housings & DSLR housings. Common housings like Canon, Olympus, Fuji, Nikon, Ikelite, Fantasea, 10Bar, Aquatica, Subal, Sea & Sea, Seatool, Nexus & Patima all use black rubber ‘O’ Rings for their rotating and push button controls.
Once all of the shafts and buttons have been lubricated and operated a few times; leave the lubricant to sit for a few minutes, and afterwards shake the housing gently to remove the excess lubricant (Best do this over an old newspaper, rather than the lounge room carpet!).
Next remove the main body ‘O’ Ring from the housing. You can use an ‘O’ ring picker (some manufacturers supply their housings with these), a tissue or even an old credit card (with a rounded corner), to remove the ‘O’ Ring.
• The only ‘O’ Rings that do not benefit from this lubrication are the main body and port ‘O’ Rings, which are sometimes made from silicon rubber which is softer and more pliable. Use only the ‘O’ Ring grease supplied by your housing manufacturer to lubricate these ‘O’ Rings. In almost 99% of housings today, any silicon rubber ‘O’ Rings are generally colored blue, red or yellow. These are the ‘O’ Rings that are lubricated with the manufacturers own silicon, usually supplied in a small tube.
• If the main body ‘O’ Ring is left continuously in-place in the housing with the rear door closed it is constantly under pressure and eventually loses its shape. It is no longer round, but slightly flattened. This reduces the ‘O’ Rings ability to seal against the housing. Once removed, the ‘O’ Ring should be cleaned (see Pre-Dive Maintenance above) and put in a plastic zip-lock bag and placed inside of the camera housing, this way you can’t forget to install it next time you dive, as the camera won’t fit the housing with the bag inside!
Long Term Maintenance
Jeff Mullins teaches underwater photography from his home in Tulamben, Bali see ReefWreckandCritter.com for details.