Attaching A Lens Port; Installing The Lens And Port - Ikelite 69121 Manual

Attaching a Lens Port

Refer to the DLM/A lens port chart to find compatible lens ports for a
wide variety of popular wide angle, zoom, and macro lenses.
Choose a dome port for wide angle and zoom lenses. Larger diameter
domes are better for split shots (half-in, half-out of the water) and
provide sharper images.
Choose a flat port for macro lenses. Flat ports magnify the subject
underwater. Flat ports are not recommended for wide angle or zoom
lenses due to their limited field of view and risk of vignetting (dark
shadows around the edges of the image).
This housing requires a compatible DLM lens port for
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waterproof operation. The housing is not waterproof without a
DLM lens port attached.

Installing the Lens and Port

1. If using a zoom gear, refer to the zoom gear instructions for proper
assembly procedure. Attach the lens to the camera.
2. Check that the port sealing surface and o-ring are clean and free
of debris.
3. Apply a very thin, even layer of lubricant to the exposed portion of
the front o-ring and to the lens port sealing surface. Avoid dry spots
or uneven build-up of lubricant.
4. Loosen the port thumbscrews until they do not show on the inside
of the lens port.
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