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| p.1 #8 · Canon 100-400mm weight when using shoulder strap? |
It shouldn't be any problem at all. It's a lightweight compared to the 70-200/2.8L IS II and 28-300/3.5-5.6L IS lenses that I carry that way for extended periods (up to fours, typically). I use 1.5" Domke Gripper straps for this.
IMO, any EF lens that doesn't have its own strap lugs should be OK to carry by the camera strap lugs, on any EOS camera. OTOH, I use pro bodies. If you're still worried about it, why not call Canon and ask them?
100-400 is not that much lighter than the 70-200/2.8 IS II, but the 28-300 is crazy heavy for the size. The first time I picked one up I could hardly believe it. I would be a bit concerned about the 100-400 swinging around unless the zoom mechanism is tightly set.