This is the upgraded lid for Lunt 40mm housing.

The only difference is the additional 52mm (M52x0.75) female thread inside.

This thread allows adding a screw-in 52mm filter into the setup.

Please refer to the drawing to make sure that your filter fits the recession - the filter outer diameter should be smaller than 56mm.

This lid is compatible with the following RafCamera LUNT housings:

• basic 40mm version
• short 40mm version
• for LS40FHa