This is a list of lenses that are available to me locally and online. Most of which are advertised as good to excellent quality. I've never had any experience using legacy lenses before and the only reason I want to is because of their fast glass and reach. So, which one would you guys recommend for a novice to try... Canon FD 300mm 2.8 L Canon FD 300mm F/4 L CANON FD 300mm F4 S.S.C Canon New FD 300mm f/4 (non L) Nikon AI-S 300mm 2.8 NIKON AF 300mm f/4 Olympus 300mm F4.5 (These lenses are under a thousand dollars, most expensive being the Canon 2.8 L and the least expensive being the Olympus) In the past I've done sports photography and occasional wildlife but never with a manual lens. I'd like to use this lens specifically for outdoor sports, i.e. Soccer, Football, Baseball, etc... and occasional wildlife. I know this list is a bit long but just wondering which one I should try and more importantly what I should look for when buying a used telephoto legacy prime lens...and yes of course I will also be buying the adapter for the camera.