Hello everybody, I was looking for a cheap telephoto lens on eBay and I stumbled across some Tokina 500mm mirror lenses starting from about 100 euro. I really like the size of these things, which would be just perfect for a micro4/3 camera. I saw a couple of bird photos taken with this kind of lens on this forum and I'm wondering if it's worth to get one for my GF1. The donut bokeh looks good to me. And such an inexpensive 1000mm telephoto lens is really tempting! Of course I should also get an adapter (probably a Canon FD). Any thoughts?