Voigtländer Ultron Vintage Line 28mm f2 Type II fish eye and there may be a

and there may be a few others out there

but it includes an original candle if you're feeling lucky

you could call it

Whether or not this is useful depends very much on whether you're feeling head-short

but you can use it on any camera that takes normal straps: nothing proprietary about it

Voigtländer Ultron Vintage Line 28mm f2 Type II fish eye and there may be aThe Voigtlnder Ultron Vintage Line 28mm f2 Type II is a fast wide angle lens for Leica M mount. This "Vintage" version has a classic look with a glossy black paint finish over a brass body, with modern aspherical lens performance. In excellent condition, with clean glass and only light cosmetic wear. With box.