I love these little Rolleis! 

This design does NOT SCREW ON, but bayonets on the standard lens features.
There are so many different Rollei 3.5 models. If the lens is the same shape as the 35 or 35S, it should fit!

Lens shades are very important for photography. 

Just line up the shade on the lens per the included instructions and turn the shade clock-wise. The shade will stop at the final position!

I am an inventor and designer with 70 US patents. I am always looking for ways to improve things. I own a lot of cameras, mostly film, and am always looking for someway to improve my photographs. I am sure I could have purchased second hood for some of the cameras, but hoods are rare and expensive for TLRs. For that reason I designed and 3D-printed this hood and cap for my l3.5F. It takes almost four hours to 3D-print the combination. As is normal for FDM 3D-printing; there may be gaps, protrusions and imperfections in the surfaces of the print (see photos), but none of these imperfections will impede shading of your lens. These are 3D printed using Tough PLA from PolyMax or MatterHackers.

The camera body in the photo is NOT included. Lens hood and cap only.