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PREPARATION OF THE LENS
Depending on the lens used, there are a number of gear options possible. Using the right gear (s) and correctly
mounting them on the lens is very important for a smooth housing operation. Use the following chart to determine
which gear(s) to use and follow the installation directions for each gear carefully. Since the aperture control is
achieved through the Sub-Command Dial, the use of AF types of lenses is mandatory. The focus/zoom gear can vary
from one lens to the other.
Gear selection chart
PRODUCT # GEAR/LENS
18703 Zoom gear EF 18-55mm
• If the camera is set in autofocus, a focus gear is not required.
• If the camera is set in manual focus or if you are using a zoom lens, a focus/zoom gear must be mounted on
the lens.
• If you are using a zoom lens with an 8" dome port you may need to install a close-up diopter on the lens to
correct the minimum focusing distance of the lens so that it will be able to focus on the virtual image created
by the dome.
Focus Gear installation:
1. Set the lens to minimum focus distance.
2. Mount the focus gear over the focus ring of the lens such that the round indentation etched on the side of the
gear is facing the rear of lens and is aligned with the Distance Index of the lens (for full gears orientation is
immaterial).
3 (a) For Slip-on gears (gears without mounting screws): Slide the gear over the lens and align the gear with the
front of the lens focusing ring.
(b) For gears with mounting screws: Tighten the three set screws evenly. Tighten each screw approximately ½ a
turn working around the gear until all the three (3) screws are tightened, and the gear is concentric with the
lens body.
CAUTION: Do not over-tighten these screws, as this might bind the lens thus restricting the rotation of the
focus ring and/or damaging the lens. Conversely under-tightening these screws might cause the gear to slip
or lose alignment.
4. Rotate the focus ring several times to make sure it moves smoothly and the gear does not slip before closing
the housing
Refer to the Lens Chart on www.aquatica.ca for updating of lenses that can be used in the housing.
WARNING: Never attempt to operate the camera in auto focus mode when a NON USM lens is mounted with a
focus gear. This might cause serious damage to your camera or to the lens.