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the problem with a lot of the bags shown here is that they look like camera bags, or carry logos that identify them as camera bags.
I have a fabric Fossil bag similar to the leather one here
FOSSIL
I use it to hold several lenses and a DSLR, it simply does not look liike a camera bag.
My normal limit is 4 M42 lenses, (assuming DSLR is in hand) or holding a second body with a single zoom (i alternate with sigma 10-20 and tamron 28075 on my two bodies)
It has additional zippered internal pouches, as well as pocket for cell phone and Ipod. (not big enough for I pad) and a front access pouch (under the flap) that is also zippered.