This one should be almost waterproof.

My previous design was just a base with a couple of O-rings to lock the glass onto the base by friction, rather than to prevent water ingress. The weatherproofing was only achieved by the upturned glass dome over the camera. But that design let insects in through the holes at the bottom, and more importantly, humid air that condensated on the cold glass inside.

This new design actually locks the glass onto a new base with locking lugs, and compresses an O-ring to seal the air inside. And the hole through which the USB cable runs is epoxied shut.

It’s not perfectly waterproof, as all 3D-printed parts are porous to a certain extent, but I’m hoping it’s enough to seal the air inside enough for a silicagel packet dropped inside to keep the air dry for at least a few days. If it’s not enough, I will seal the 3D-printed parts with spray-on varnish.

Also, as an added bonus, the glass dome is now solidly attached to the base. With the first design, when the O-rings got wet, the glass could slide off easily. It stayed put mostly by gravity alone, because there’s never too much wind here. But it was a bit concerning if a bird ever knocked the glass dome loose or something.

With the new locking lugs, I could shake the tripod upside down and nothing would happen.