I first thought the Topeck Tourguide bag would be way to big for my needs, but come to find out its perfect.
I mainly shoot with prime lenses and can fit my Olympus PEN-F with Panasonic 25mm lens mounted and carry my Olympus 17mm and 45mm along with me.
PEN-F with 25mm, 17,mm and 45mm
Gluing 2 lens butt caps together keeps them from beating the crap out of each other while being transported.
PEN-F & 12-40mm 2.8 Pro lens