I recently bought a PhotoBackpacker P3 backpack to hold my 4×5 field camera kit. The other day a gentleman asked me if it would work for a Toyo 810 field camera. It certainly would, depending on how much extra space was needed for other things.
On the inside, the black area is female velcro. The ruler is 25″ long.
The two rectangles are double male velcro strips. You get a bunch, and they can go anywhere. They hold the interior cases down and to each other.
The closest camera in size to a Toyo 810M that I have on hand is an Eastman Commercial 8×10 from about 1928:
Here it is set in the bottom of the pack:
The next picture shows the camera with a multi-lens case. The cases can be put anywhere and in any orientation. The middle lens is in a Copal #3 shutter. You can also get individual lens cases for most sized lenses, including ones on 6″ boards.
As I said before, the cases can be securely Velcro’d to the back of the backpack, as well as to each other.
I estimate that 5 8×10 film holders will fit in the second compartment.
The P3 has a great suspension, lots of storage space, and it’s light weight.