DIVEVOLKExpansion Clamp for Sea Touch 4 Underwater Housing Including Red Filter/Purple Filter Clamp + Conversion Ring

I recently purchased the lens attachment for the SeaTouch 4 Max, expecting it to elevate the functionality of the base unit. Unfortunately, I was left feeling that this is a feature that should have been included in the original SeaTouch 4 Max—and after using it, I can see why it wasn't.Straight out of the box, the attachment's metal components were covered with an odd, multicoloured, oily sheen giving it an eroded look. This immediately raised concerns about the quality and durability of the materials used. Worse still, two of the mounting screws showed signs of rust or corrosion before I even touched them, which is unacceptable for a product designed to be used underwater.When I attempted to attach the unit, the screws wouldn’t thread in properly, making it impossible to securely mount the lens. Even if I had been able to, the fit was poor. It felt like the attachment was too small for the base unit, causing it to bend in areas where it clearly shouldn’t. I wouldn’t trust putting any additional attachments onto this, as it feels like the whole thing could break under pressure.Overall, this attachment falls short of expectations. The fit, finish, and durability issues make it hard to recommend, and it's disappointing that such a key feature was left out of the base model, only to be executed poorly in this add-on. Not worth the investment.

The clamp would just not screw on. I had to order another one as I spent hours trying to screw it on and it just wouldn't happen. There was not enough place at the bottom for the screw to fit in.