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Ewa-Marine CA Adapter SystemThe 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 housing's front port are permanently parallel to each other, thus assuring that there are no reflections, 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. The CA system is composed of a filter-ring and a fixing-ring. We generally supply the appropriate ring for the most popular camcorders. Due to the enormous range of camcorders and the fact that some manufacturers choose obscure, new, filter threads for every new model, 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 available from every well-stocked photo dealer. Tip for users of Panasonic camcorders and their generics: In some cases it would seem, that the camcorder does not have a filter thread! This isn't true. The manufacturer, for design reasons, has fitted the camcorder with a dummy that is screwed into the thread. Turn and unscrew this lens "surround" (normally chromed plastic) to gain access 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: 49mm, 52mm, 55mm, 58mm and 62mm. Filter rings for the sizes 67mm and 72mm are available as an option and can be ordered through your dealer. If you have an auto-focus SLR with an internally focusing lens (please note, only fully internally focusing lenses), you can also purchase a CA system for your U-A, U-AX, U-AXP and U-AZ housings to replace the AV100 or AV110 for easier assembly. For assembly, 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 groove 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. |
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