ewa-marine CA - adapter system:

The patented CA system was invented and developed by ewa-marine to allow the lens of a camera to be fixed to the front port of a housing or rain cape. It ensures that the surface of the lens and that of the housings front port are permanently paralell to each other, thus ensureing that there are nor refections or other optical disturbances between these two glass surfaces. Due to the CA system, the front port has the same effect as a clear glass filter would have in every day photography.

 

Description:

The CA system is composed of an filter-ring and a fixing-ring
For video housings we generally supply the appropriate ring for the most popular camcorders. Due to the enormous range of camcorders and the fact that some manufacturers chose obscure, new filter threads for every new modle, you might have to purchase an additional reduction adapter to fit the CA system to the filter thread of your camcorder. These reduction adapters are availible from every well stocked photo dealer.
A tip for users of Panasonic camcorders and their generics: In some cases it would seem, that the camcorder does not hav a filter thread! This is not true. For design reasons the manufacturer has fitted the camcorder with a dummy that is screwd into the tread. Turn and unscrew this lens surround (normally chromed plastic) to gain acess to the filter thread.
The SLR-housings of the U-F.. range are sold with one fixing-ring and the following selection of filter-rings:

49, 52, 55, 58 and 62mm

Filter rings for the sizes 67mm and 72mm are availible as an option and can be ordered through your dealer.

If you have an autofocus SLR with an internally focusing lens (please note, only fully internally focusing lenses!), you can also purchase a CAF system for your housings to replace the AV100 or AV110 for easier assembly.

Assembly instruction:

  • screw the filter-ring onto the lens of the camera or camcorder.
  • Then take the fixing-ring into both hands and clip it into the grove of the filter-ring as seen in the sketch above.
  • The camera can now be put into the housing and then fixed to the front port by gently pushing the port over the lens.
The CA58 adapter as an example of the ewa-marine CA-System
The CA58 as an example (assembly in the background, both parts separate in the foreground)

Special Adaptor for 77 und 82mm filterthreads

For filterthreads of 77 and 82mm we offer custom made aluminum adaptors. These screw on to the filterthread and fix the lens with our front port.


 

All data and pictures show the current state and design at the time when this page was last edited. ewa-marine can change and improve the design of individual products at any time during the manufacturing process. For this reason products currently available on the market may differ in some details from the pictures shown on these pages. ewa-marine reserves the right not to be responsible for the topicality, correctness, completeness or quality of the information provided. Liability claims regarding damage caused by the use of any information provided, including any kind of information which is incomplete or incorrect, will therefore be rejected.
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