I have a smaller Pelican case,(I’m 2200) with pick and pluck foam, so I can’t give you exact information but maybe it can help a bit. That.is a KP, DA 1.4 converter, and DA*300 lens with hood reversed. The case has a 15 inch measurement that way. That is a filter case that is 1/2 inch wide, the width of the pluck sections, so you can kind of figure it out. B & H says the Trekpack dividers are 3/4 inch. I guess another option could be get the foam and pluck out enough to put a full camera bag inside, but that would not offer the same protection. I’m very impressed with the Pelican case, I think I could drop that case from 20 feet on concrete and it would protect the gear, but I’m not going to test that! I got mine to travel by boat, but I may use it for air travel some day.