I contemplated several bags and went between the 100 and the 150 before deciding on the 100. It holds all I need it to hold when I need to travel light. I may get the 150 eventually because any lens bigger than the ones I currently have wont fit lol. Let me know your thoughts! www.youtube.com/watch?v=Nvh8CPPowfU EM1 with the following lenses: 14mm f2.5, 25mm f1.8, 45mm f1.8, 75mm f1.8. The Nissin i40 flash is also in there with stofen and the flash that comes with the em1.