The AV110 was developed for the use of auto focus lenses in the U-A...series of ewa-marine housings. The function of the AV110 is to ensure a fixed and rigidconnection of the housing's front port to the tripod thread under the camera's body. Thisthen allows the autofocus to lengthen or shorten the effective length of the lens withoutbeeing effected by the surrounding water. Without the AV110 the lenses motor would have to"pump" air from the rear of the housing to the front, and vice versa, duringfocussing. This definitely exceeds the design specification of the motor and could lead to
Naturally, the AV110 can also be used in all the current housings ofthe U-F... series.
There are three different versions of the AV110:
The AV110 was developed from the predecessor, the AV100. Housings thatwere designed for the AV100 can also use the AV110. Older housings, that were suppliedwith the AV90 can not use the AV110! (please note, spare parts for the AV90 are still onstock, if required)
1. short spacer
2. long spacer
3. curved spacer
4. bottom plate
5. front ring
6. tripod screw
7. assembly screw with washer
8. connecting rods
Please note:This asambly is that of the standard AV110, The AV110-P (asused in th ewa-marine U-AXP) and the AV110-L (as used in the ewa-marine U-AZ) differ insome points and and may have different and additional spacers, as required for thesehousings.
Always assemble the AV110 in such a way, that the center of thecameras lens is directly in the center of the front ring. To achieve this, use thecombination from the above sketch, or, if necessary, use different spacer combinations toachieve the desired result.
Always check, that there is enough space between the lens and the front port whenassembled. This will be necessary to allow the auto foucs to operate the lens without itactually touching the front port. The distance between the lens and the front port shouldbe, depending on the lens, between 5 and20 mm (0,2 and 0,8 inches).
Here a selection of possible assemblies (other versions are possible,depending on your camera: