| If you are using a threaded ad on lens be careful not to over-tighten it as you may risk removing the housing lens port ring with it. Use a silver or white waterproof pen to mark a line on both the housing and lens ring in a location that you will easily see each time you mount and un-mount your ad on lens. The line-up of the marks will tell you if the lens ring has moved. The silver marks in the photo below are on the lower right of the housing and lens ring (Inon Type 1 Wide Angle Lens adaptor ring - black in color) so as to be easily seen while reaching around to mount and un-mount the wide angle lens. |
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