I wanted to have a lenshood for my videocamera.

The inner diameter is 7cm. I also uploaded the catia source file, so you can adjust it as needed.

The full version and the first halve version have a wall thickness of 2 mm. I also uploaded a 1.5mm version, for those who want to save some material. (About 2 meters of 1.75mm filament per halve)

Print the full part (rather big, 16x5.6x9.5 cm), or two halve parts (9.5x5.6x8 cm)

I would recommend to print the 2mm small version since it uses the least material and is big enough to block the nasty lights.