As mentioned in another thread, I ordered a new lens last week, a Fujian CCTV C-mount lens. I paid £16 for it! It arrived today and it's a 35mm f/1.7 and it will be saddled up to my little Sony NEX 5. The adapter arrived a couple of days ago, so there's nothing stopping me now!
It's extremely small, but beautifully made. Playing around with it for a while, it looks like it might be a bit tricky to accurately focus quickly with it, as the circumference of the control rings is very small.
I will be prowling round the streets of Lancaster for a couple of hours with it tomorrow, so I shall report back. Hopefully, I will have some images to share too.