The lenses add way more bulk and weight than having a camcorder. Having just one zoom lens might be heavy. I think it depends on what you are shooting and how much gear you're looking to carry.I’m wondering same thing. I am going to learn the video function on my DSLR, it would be nice to carry just one camera. I’ll probably have that along anyway, so maybe don’t need another thing to carry. Curious what others are doing.