I didn't take the RF 28-70 f/2.8 off my camera more than a few times since I got it. It is now my favorite lens by far. If Canon was to launch a telephoto zoom of the same quality, I'd probably get it and sell my prime lenses. This 16-28 isn't for me, as I already have the RF 15-30 and don't use it enough to justify a more expensive lens.