Use & Care of Housing Pre Dive Function Check

5. Use & Care of Housing:

5.1Pre Dive Function Check.

Just before entering the water, make a habit of reviewing that you have carried out the proper steps to close the housing. and the pressure release plug screwed home. Make a

visual check of the O-ring seal. It is also useful to switch on the camera, and check that controls e.g. on/off, zoom, shutter functions operate normally.

Check housing is closed. Close pressure release plug

Check battery and memory card status on the LCD display. Check control knob and zoom function.

If there is a large change of temperature and the housing is not opened for maintenance between dives, it is recommended to equalize the possible pressure difference between the inside of the housing and the ambient by opening the pressure release plug and close it firmly subsequently. Always avoid submerging the housing in hot water for a prolonged time or a cleansing tank where the water may be heated up by the sun.

5.2General Operation.

The control levers and push buttons consist of internal double O-ring seals on a stainless steel shaft. This arrangement is very reliable, however as a precaution, when operating the controls, avoid excessively rapid movements, as this may distort the O-ring. Also please allow for the fact that the camera takes a few seconds to power on. If the camera dose not appear to respond to a control action, make sure that no other controls are pressing on the camera, i.e. locking out further actions. Wear the wrist strap; it is easy to inadvertently let go of the housing, especially if you are distracted.

5.3Cleaning & Storage.

The body & lid of the housing are made of polycarbonate. Polycarbonate was selected for its outstanding strength stiffness, hardness and toughness. As well as its crystal clear transparency and high gloss surface. It has good resistance to weathering, although long term exposure to sunlight should be avoided. Normal operating temperature range is 3°C to 36°C (Storage temperature: -10°C to 50°C) It is good practice to rinse off your housing with fresh water after every dive. Avoid exposure to fine sand. After a series of 10 or more dives, e.g. after a dive holiday, it is recommended to immerse the housing for 2-3 hours in warm water to dissolve any salt deposits that may have built up. No chemical cleaners should be used. Mild detergents e.g. shampoo and soap based cleaners are permitted.

Important !!! Some household chemicals may harm Polycarbonate; the housing should never be exposed to the following classes of chemicals: benzene, toluene, xylene, chlorinated hydrocarbons, methanol, any other solvents, strong acids and bases.

For long term storage please remove the main o-ring from body.

5.4Transportation.

When transporting by air, please ensure the housing is not sealed, to allow the air pressure to equalize. Either remove the O -ring (recommended), or open the pressure release port (a spacer is provided to keep the pressure plug in the open position, please make sure there is no bending of the plug while open). Please protect the housing during transportation. It is recommended to remove the handle, and shutter extension, and wrap the camera in foam or bubble wrap.

400D specifications

The Canon EOS 350D, 300D, and 400D are pivotal models in the history of Canon's digital SLRs, each contributing significantly to the popularization of DSLR technology among enthusiasts and professionals.

The Canon EOS 300D, introduced in 2003, marked a turning point for digital photography. It was Canon's first entry-level DSLR and brought professional-quality features to a wider audience. It features an 18-megapixel APS-C sensor, capturing images at a maximum resolution of 3072 x 2048 pixels. One of its defining characteristics was the inclusion of an 8-megapixel sensor, which was revolutionary at the time, allowing photographers to produce detailed images. The camera also provided a robust build and a user-friendly interface, making it accessible to beginners.

In 2005, Canon released the EOS 350D, building upon the 300D's foundation. The 350D refined the design with a smaller and lighter body, while also bumping up the resolution to 8 megapixels. It introduced a 2-inch LCD screen with a sharper display, enhancing usability. The camera also incorporated a more advanced DIGIC II image processor, improving overall performance, including faster autofocus and better noise control at higher ISO settings. The 350D supported a range of lenses, further expanding creative possibilities for users.

The Canon EOS 400D, launched in 2006, pushed the envelope further. With a resolution of 10 megapixels, it offered even more detail in images. The 400D introduced a newly designed dust reduction system, effectively combating sensor dust—a common issue for DSLRs. The 2.5-inch LCD screen was larger and featured a better viewing angle, allowing for more comfortable composing and reviewing of shots. This model was also equipped with the DIGIC III processor, which improved shooting speed and image quality, particularly in challenging lighting conditions.

All three models share a commitment to durability, usability, and performance, making them ideal choices for budding photographers. Their compatibility with Canon's extensive EF lens lineup ensures that users have access to a broad range of focal lengths and creative options.

In summary, the Canon EOS 300D, 350D, and 400D each played a significant role in the evolution of digital photography, providing key technologies and features that appeal to both novice and seasoned photographers alike. Their legacy continues to influence Canon's current offerings in the DSLR market.