I'm just getting started on all of this so I don't have a great idea when people warn "but it's really heavy" what exactly that means. The kit lens seemed very light, I grabbed a nifty fifty that also seemed super light and then I got a Tamaron 24-75 f2.8 (these are the only three lenses I have ever handled).
The Tam seems about as heavy as I would enjoy shooting with (maybe I should hit the gym). I was considering replacing it with something slightly longer (currently looking at a Sigma 50-150 f2.8) but would like to know the size difference first. Is there somewhere that lists lenses and gives size and weight?

