I have a Canon FD mount 100-300mm f/5.6 legacy manual focus lens for sale. Aperture ring and zoom works fine, etc.. Lens does exhibit zoom creep, but I suspect all lens of this generation are affected by it. Comes with front lens cap and rear lens cap. Price lowered to $60, your cost out-the-door. This price includes shipping and Paypal fees. Sorry USA only. You can find my username 'hiep' on eBay if you're curious about feedback.