@Kombi first, use a smaller f/# to help blur the chain link! Depending on how good you are with PS or other software you can shoot multiple (more than 4) exposures of your target as you drift to the side. If your object is far away and mostly stationary you can use these images to help piece together the subject through the blurred chain. There may be commercial programs that do this straight away. In MATLAB I do something similar called correlating areas of multiple images. Anything that doesn't correlate gets filtered.