Hmmm.....Looks familiar...also looks like it fits into something....OTOH, when used, it does release a result from within something.  pushes something out?

Based on images in your gallery, I am pretty sure that someone in your area has one and uses it. 

Sounds like a bit of photo equipment.... an extention for ..? what I wonder.  you hold it  steady.
I would think it has got to do with reflectors or even focus.......nope nothing comes to mind
unberella?