I have been trying a few versions of a camera insert. I started here:
using some of my fabric from the handprinted fat quarter swap.
As you can see, it is less than perfect. But it is very well padded being made of neoprene. Yes, neoprene.
So then I tried it just plain neoprene. The interior seperators are held in place by velcro.
The plain neoprene fits perfect in here: