Octagonal prism

In geometry, the octagonal prism is a prism comprising eight rectangular sides joining two regular octagon caps.

Images
The octagonal prism can also be seen as a tiling on a sphere:
 * Spherical octagonal prism.svg

Use
In optics, octagonal prisms are used to generate flicker-free images in movie projectors.

In uniform honeycombs and 4-polytopes
It is an element of three uniform honeycombs:

It is also an element of two four-dimensional uniform 4-polytopes: