Looking at all the fine shots taken with big glass I have lusted after one for years. Every now and then I come across some quality big glass at a decent price but without the camera to use in on I've not taken the risk. The 400 to 600 range is what I'm looking for and Micro four thirds has not offered anything yet. Nice looking 300 2.8 is not yet available and I do plan on getting one when my VA pension kicks in. Manual focus on a gimbal mount is required for movement and a very fast lens is a must. Kowa spotting scope works for some stuff but is just too limited without aperture control. I've seen good Nikon or Cannon lenses gathering dust in old pawn shops with price tags under 2K that have excellent optics even though rough looking shells. My cheap 75-300 olympus 4/3rd lens is ok but I cannot follow movement with reliable results. The Panny 100-400 is tempting me but still not fast enough. Auto focus would help but I don't believe that is as important as lens speed. Birds in flight, animals on the run, city police/homeless chases would all be things I'd use it for. A Blackmagic Pocket and an Olympus PL-7 with eye piece adapter would be my main bodies. The Pen F is looking good but I'm waiting for something better to hit the shelves. Who else has this view and dream? What big glass do you like on M43?