As new, I bought it, I tried it once, decided it was not for me.

I could trade for a Pentax 03 fish eye lens or zoom lens 02 or 06 (+ cash for you)
Focal Length 18mm F8 Equivalent to 100mm in 35mm format
Fixed Diaphragm control
Very Lightweight
Usable for telephoto shooting + Macro shooting
Compatible with PENTAX Q digital interchangeable lens systemcamera

Amazon link: http://www.amazon.co.uk/Pentax-Toy-Lens-Telephoto-System/dp/B005CMDP6M/ref=sr_1_2?ie=UTF8&qid=1352704354&sr=8-2