Sigma Zoom Telephoto 170-500mm f/5-6.3 APO Aspherical Autofocus Lens for Canon EOS "eo f5" Questions

sigma 170-500 f5.6 not focuing at 500mm hello there i have a sigma 170-500mm f5-6.3 apo dg sigma nikon mount lens,please could you tell me where i could get the lens repaired as soon as possible ready

autofocus not working hello there i have a sigma 170-500mm f5-6.3 apo dg sigma canon mount lens,the motor has stopped working and the lens will not autofocus,please could you tell me where i could get

sigma 170-500mm f.5-5.6. fit on nikon d 200 ??? and i wild like to how good is this one 170-500mm Sigma makes their lenses with a variety of mounts for a variety of cameras. A lens with a Canon mount,

Is there any possible way that this lens can be hooked up to an EOS? More specifically a Canon 7D? The answer to this is Yes and No. Yes there is an adapter to take the FD mount lens which is Canon's ...