srt101fan wrote:
In case nobody has addressed your question, here's my two cents worth. And sorry, but I don't have a visual.
Many (most?) lenses come with a lens shade, or you can buy one separately. In use, the lens shade mounts on the front end of the lens. For storage, the lens shade can be turned around and slid over the lens barrel, thereby reducing the length of the assembly.
Hope this helps.
Basically, except for some tangential responses, the discussion is regarding shooting pictures with the hood in the storage position.