Now i do know a little about these and having just taken mine on holiday again i have come to the conclusion it's bloody heavy.
I love my camera and it can take a cracking picture too, but carrying it around all day long it does get heavy, plus you may have a few more lenses in the bag too.
I have been using my phone to take lots of pictures and i can down load them straight on to Facebook plus they are quite good too.
The only problem is these taken by the phone cannot be blown upto large sizes like i can with the Nikon.
Mind you having my phone, my wallet, my glasses, the map, the coat, Ems laptop, selfy stick and a pen in the bag does not help.