CANON EOS 5D MARK II with ZEISS CY VARIO-SONNAR 28-85MM F3.3-4 Sample Photo 515938 By opal

Best Technique of Taking Photo by following the subject with shutter time (1/15s). My limit is sharp photo of building, when I stand firmly, with focal 35mm and shutter 1/15s (but I use APS-C). But You did this ultimately sharp front of locomotive, with shutter 1/15, focal 28mm and moving train at least 50 km/h. Very very great Job, I like Your photo much and I admire Your technique :)