A bit of a mistake….
So what I did was took a look at my older Lowepro Top Load Zoom 1 bag (seen here):
And I was getting tired of skiing with a backpack, but wanted to haul a camera along…so I bought the chest harness strap kit (seen here):
That allowed me to carry my bag like this (seen here), and skiing with it was great:
But I was only loading a DSLR with a short zoom – 18-55mm kit lens. I wanted something (a TLZ bag) a little bigger that would handle my 55-250mm or my 17-55mm f/2.8, maybe my 11-16mm f/2.8 or even, dare I think, my 100mm f/2.8 macro. I started online shopping…and found the LowePro TLZ 50 AW – which was also compatible with the chest harness. It advertised that it would fit the DSLR with the 17-55mm f/2.8 attached. I lined up my lenses and they would all work…maybe even the macro – it was less than 1/2” taller than the 17-55mm… Click, Click – and I bought one from e-bay! It arrived a few days later, and much to my surprise it was about the same size as the one I already had! 
I never even thought to try the bag I already owned – I just assumed it would be too small….here is the new one:
There are a couple of differences with this bag – it has the Sliplock attachments on the side to add a lens case, etc. and it has an all weather cover tucked in the bottom. It is about 1/2” deeper as well, so I am still happy, mostly….
And I did try it skiing, I strapped a #1 Lowepro lens case to one side and slid in the Canon Vixia HF R200 Camcorder – it fit easily.
-André
