Re: f-stop design:
Yes, you have to take the pack off when you want to access your camera stowed in the padded insert. The access panel is on the part of the pack sitting on your back. The good part is that you can plop the pack, outer surface or base down, in the dirt, access camera, then when you put your pack back on, you don't get a backful of mud.
I use the pack in combination with the Cotton Carrier vest system, so that I have the camera at hand. Little accessories can go in clothing pockets.
I didn't like the side-stow option for the tripod, so I use strapping to attach it on a diagonal across the back. It just felt better balanced that way. I have the 60 L Satori, which is a good size for a camping pack, but too bulky for a day pack. The medium pro insert takes up approximately 15 L, so the remainder is available for bedding, food, spare clothes, stove, water filter; I hang water bottles from outside loops.
I am not as enthusiastic about the pack as I could be, but that is because the pack is "one size fits all" in torso length, and my torso length is too short, requiring after-market adaptations. The pack frame is really sized for the average man, and the pack straps also cut for men. I would like it if future iterations would have adjustable torso length and exchangeable straps. I would also prefer that the pack have loops on the bottom, for sleeping bag or extra pad. Still, the great thing about the pack is that it keeps the heavy camera gear gear on your hips close to your back, making it easier to carry 35#/ 16 kg of camera and camping gear. I am sure that the pack could accommodate much more weight, it is really well built. The pack belt and straps are very thick and well made.