Customizable 67 mm Wet Lens Flip Adapter for Underwater Photography

Wet lens adapters simplify underwater macro photography, making it far more ergonomic. Unwilling to spend hundreds of euros on a technically simple part, I designed my own. The original version, printed in carbon fiber-reinforced PA, has been in use for 8+ years and 60+ dives—and still works perfectly.

You can choose between:

• The original proven simple model (tested and reliable).

• A modular design with customizable surface textures (Rock, Coral, Waves) and the option to add decorative elements like fish, octopus, or coral for a personal touch. To attach these decorations, position them on the adapter and use a Boolean difference operation to create a recess in the main model, ensuring a secure fit (or just use the already prepared versions).

Printing Requirements:
Since fine threads cannot be 3D printed, you’ll need:

• 2x 67 mm filter rings (cheap options available for under €1; example here).

  • Remove the glass from the filters.

  • The STL files include two grooves to prevent the filter rings from rotating. Use a file to grind these grooves into the rings.

  • One ring is glued into the camera-facing mount after printing.

  • The lens mount ring is inserted during printing by pausing the print.

• 1x M5x50 screw (cylinder head, hex socket) and 1x M5 nut.

  • The screw cuts into the plastic through-hole, allowing you to adjust resistance via torque.

• Optional: Ø4x2 mm magnets (pockets included in the design). If used, seal them with epoxy to prevent corrosion. (Originally, I thought this would be a good idea. However, it turns out that setting the right resistance using the screws works much better.)

Key Features:
✅ Proven durability – 8+ years, 60+ dives.
✅ Customizable – Choose textures and decorative elements.
✅ Affordable – Uses €1 filter rings, M5 screw/nut.