Seriously? No such thing.
I have been reminded by necessity, that there is no perfect camera bag, but, their is often the perfect bag for a specific situation.
My bag stocks are embarrassingly large.
Even after years of selling of and gifting, I still lay claim to a dozen or so real camera bags and thanks to M43’s size factor, several non camera specific bags that do the job.
What do I Use?
No single one. Not even a small selection. I use anything at hand, depending on what I am doing (purchasing back my 40-150 Pro has also forced a re-think).
If getting there is more difficult than being there;
LowPro Pro Tactic 350 AW (1st edition). Not my favourite bag to wear (I find it too small and uncomfortable), but great for travelling or simply hauling a decent amount of gear from here to there. I often use this for stage photography, placing the bag in a handy location, because I tend to use several cameras with primes on them, which is impractical with any other bag except maybe the F2. It also goes on a plane with me (remember those?), because it is quite rigid, making it ideal as a foot rest or occasional pillow on lay-overs. (Not reviewed yet)
If being there is as difficult as getting there;
Domke F820 Satchel. This one has just been promoted back to my every day bag. The 40-150 pro, on a smaller camera like an EM10 or 5, fits perfectly in a ready to go configuration (with screw in metal hood fitted). The 12-40 fits on another and with a few other bits (or as many as I like with the extra pockets fitted), and I am ready for most situations. This bag has that magical ability of taking weight and making it feel relatively lighter. Some bags actually feel heavier than they are, this one, with its all around strap, postman’s shoulder pad and semi-rigid top does not. Testing the theory, 2 huge add-on pockets can be attached and the thing can take a ridiculous amount of gear. My only complaint is that it will not comfortably take a bigger camera like the EM1 with grip and a larger lens. (Reviewed).
If being there is more difficult than getting there;
Domke F2 (original). 35+ years old and going strong. This one most often takes odd shaped kits like a camera with flash and modifier fitted, a camera with grip and big lens or lighting gear. It is still a classic, made by a professional, for professionals and it shows. Gear has changed over the years, but this bag, sporting a new insert and strap just works. My wife hates it (it is a little ugly) and I must admit the ancient grubby-chic look has worn thin with me also, but when nothing else works…. . (Reviewed)
If being there is about moving fast and light;
Think Tank Turnstyle 10. When shooting sports, I use this in conjunction with a slung camera. It holds a second camera and lens option, spare bits and my phone in a “get out of the way” configuration. Invisible and low profile until I need it, this thing holds an amazing amount. It also takes a water bottle pouch in the strap without effect. (Reviewed)
If it is important to blend in when you are there;
Filson Camera Field Bag. This a sentimental favourite and my favourite bag when something a little nicer is called for. It has a flaw (fixable if needed), in that it sags in the middle when packed tight. This tends to make it annoying when working fast from the hip. A rigid base would help or careful packing, but that rarely works in the heat of the moment. If I am travelling with a small kit and other things, it is nice and if my kit needs are minimal it works fine, but no Pro lenses or multi body kits. (Reviewed)
Domke F3x Rugger Wear (olive-very rare). Great when it is wet and I need to keep working, the F3x Rugged is ideal. It hugs my hip and the flap sits properly covering the main compartment, meaning it actually does keep water out. It smells a little (oil), looks 80’s style Army disposal-worn out, but like the F2, it does what it is designed to do. Many of my other bags are weather proof, but usually with a catch. The other Domke’s are not as water proof (they make this line), the TT and LP need their water proof sleeves, making them impractical and the Filson, made of a similar cloth, is not as good at wrapping up it’s insides. (Reviewed)
There are many others that fit into to this anti-camera bag niche (Filson Field Bag, Timbuk2 satchel, Tokyo Porter tote, Crumpler satchel etc), but these are the “A” team for work.
Could I work with only one or two?
One only; A Domke (someone else would probably have to choose though).
Two; As above and the Pro Tactic.
Three; As above with the TT.