I recently got a Sigma 150-600 lens to use with my Canon 70D. The lens weighs about 4 pounds. This may be a dumb question, but if I carry the camera with lens attached with the camera strap around my neck, with the lens pointed down, is there a danger that the weight of the lens puts too much strain on the mount and something may break? Would it be better to use the strap that came with the lens that attaches to the tripod collar that attaches to the lens? (I don't by the way use a tripod, although I understand all the reasons why maybe I should).