I was looking for a bag for me to change lenses while walking, this one fits my expectations. I put a 5D mounted with a zoom L-series zoom 24/70 + a second series L + 2 sunshades (so rather big enough). Since I always have my camera in hand or shoulder strap, the bag is not too heavy. There is of course room for cards and batteries. This bag also allows me to have a backpack to eventually carry more equipment or anything else. I titrais "almost perfect" because I would have liked to remove the belt in order to be with just a shoulder bag when I walk around town, since despite its small size it is not always practical to sneak into the crowd.