The usual disclaimers: It was a faulty lens that took blurry pictures and wasn't worth having repaired. besides the fact that it's nobody's business if I want to burn something I own.
Add some potasium nitrate, sugar, outdoor torch fluid and sawdust to an old faulty lens - and make its last photography experience something to remember.
At first the flames were small. Adding torch fluid to the smoke bomb mix helps slow the burning process down but also makes it harder to light so I pushed some matches backwards into the mix to help it start burning.
I had the mix packed into both ends of the lens but it didn't burn all the way through so I ended up pulling the front of to light that separately afterwards.
The little Nikon J1 is useful for the videos.