I use a seatpost mounted Tooo Cycling camera DVR80 on the back of my road bike, but during wet weather, water and mud get washed up off the rear wheel and obscure the picture. I don't want to ruin the lines of my bike with a mudguard, so an unobtrusive guard for the camera lens itself was required. As there is a light on the camera unit, underneath the lens, then any guard could not obscure it.

I printed this in TPU. It produces a tight fitting cover, which will be secure on the bike.