You know what they say about one man's trash. Well, lens enthusiast and freelance video producer Mathieu Stern took the phrase to heart when he found an old lens tube at his local flea market. It was in a box of unsold items destined for the trash when he rescued it and gave it a new life. With the addition of an ND M42 to NEX adapter, M42 tubes and a couple of rubber bands, the 'Crapinon 135mm' was born. 

Stern admits that the lens isn't too sharp, as you'd expect, but it does work. See some of his sample images above. You can see more of his work at his YouTube channel and his website.