A few years back I did something a little unhinged. I took a perfectly good camera bag and cut it open. Not because I was angry at it, but because I wanted to know why the dividers had stopped doing their job. Under the nylon skin was a slab of open-cell foam that had compressed into something closer to a stale cracker than a cushion. The bag still looked padded. But on the inside, it had quietly become a hard box with fabric walls.
That little autopsy changed how I think about camera bags. The divider system is not some passive tray of foam you Velcro into place and forget about. It's an argument about how a photographer should work. How fast. How careful. How mobile. How discreet. And like any good argument, it has a history, a physics problem hiding inside it, and a future that's already taking shape.
We rarely talk about bags this way. We obsess over weather resistance, tripod straps, and whether the laptop sleeve can swallow a 16-inch MacBook. But the internal dividers-the part you touch every single time you reach for a lens-are where photography's changing values get stitched into place. They've evolved from wooden cabinets to canvas walls to thick foam armor. And right now, they're in the middle of another identity crisis.
Here's what the divider system actually teaches us about protection, access, and the way we shoot.
The Case as Cabinet: When Protection Meant Keeping Things Still
In the early twentieth century, a camera bag wasn't really a bag. It was a portable cabinet. Large-format press cameras, plate holders, film sheaths, and brass lenses lived in leather cases with wooden frame inserts and felt-lined compartments. The dividers were fixed. The goal wasn't quick access. The goal was immobilization.
A Speed Graphic body alone weighed around 2.4 kilograms. Add a lens, three or four film holders, a flash unit, and a box of bulbs, and you were carrying a small piece of furniture. Those wooden dividers had to stop heavy metal and glass from shifting during train travel, wagon rides, or a fall from a car seat. They did that job well, but they demanded a ritual: unbuckle the case, open the lid, lift the camera out, set it on a tripod, compose, focus, insert a holder, expose.
That was acceptable because photography itself was slow. The divider system mirrored the craft. It was fixed because the workflow was fixed. The photographer was a technician, and the bag was a cabinet of tools.
That idea never fully disappeared. It just changed materials.
Jim Domke and the Soft Divider Revolution
By the 1960s and 1970s, 35mm film had changed what it meant to be a photographer. Photojournalists moved through crowds, climbed fire escapes, worked in rain and dust, and needed to change lenses without looking down. The hard case became an obstacle.
The most influential response came from Jim Domke, a newspaper photographer who designed the Domke F-2 bag in 1976. It was made of canvas, slung close to the body, and deliberately looked nothing like an expensive camera case. Its dividers were thin, flexible, and removable-nothing like the wooden partitions of the previous era. They didn't encase each lens in a protective box. They simply kept lenses from knocking together while leaving enough open space to reach in and grab a body by feel.
That was a radical shift. A Domke bag sacrificed physical protection for speed and discretion. The dividers were part of that argument: a photographer on assignment is more likely to miss a shot because of friction than to destroy a lens from a short bump. In the field, a few millimeters of closed-cell foam was enough.
The cultural context mattered. A photojournalist in a crowd didn't want to advertise that they carried two bodies and four primes. The soft, quiet, beat-up canvas bag became part of the working photographer's identity. Dividers weren't armor. They were organization.
That bag made a statement about its owner: You are a working journalist. Move fast. Blend in. The gear is replaceable; the moment is not.
The Foam Arms Race: More Padding, More Friction
The digital SLR era changed the math. From the late 1990s into the 2010s, cameras became computers. They got heavier, denser, and much more expensive. A professional DSLR body like the Canon 1D X weighed over 1.5 kilograms. A 70-200mm f/2.8 lens weighed roughly the same. A full working kit-two bodies, three pro zooms, a laptop, batteries, flash-could easily reach 15 to 20 kilograms.
In response, the camera bag industry entered what I think of as the foam arms race. Bag makers built increasingly thick dividers, reinforced shells, all-weather covers, and multi-layer protection systems. Brands like Lowepro, Tamrac, and later Think Tank turned the divider system into a marketing feature: more foam, more configurable walls, more "security." Dividers grew from 8 millimeters to 20 or 30 millimeters thick. Some bags had aluminum stays, suspending the camera in a cage of padding.
The message was clear: your gear is an investment, and this bag will protect it.
There was truth in that. A dropped 1.5-kilogram camera can destroy a lens mount or crack an internal circuit board. But the foam arms race created a new problem. The more padded, segmented, and over-divided a bag became, the more friction it introduced between the photographer and the photograph.
I've timed this in my own work. From a heavily divided backpack, a lens swap can take eight to twelve seconds: open the main zipper, undo a flap, pull out the lens, reverse the rear caps, tuck the first lens into a tight compartment, fold the flap back over, close the zipper. From a well-designed bag with fewer dividers and an open center compartment, the same swap takes four to six seconds.
Over a day of shooting, that difference compounds. A wedding photographer might change lenses twenty times. At six seconds per change instead of twelve, that's two extra minutes of active shooting. In a ten-minute portrait window, that's the difference between trying a new composition and giving up.
In that sense, an over-divided bag edits your work. It quietly tells you that changing lenses isn't worth the hassle. You stop experimenting with focal lengths. You leave the 85mm in the bag. You shoot the whole day with the 35mm, not because it's the right lens, but because it's the one already on the camera.
That's not just an ergonomic issue. It's a creative one.
Mirrorless and the Divider Identity Crisis
Then mirrorless happened, and the old divider vocabulary stopped making sense.
According to CIPA data, mirrorless camera shipments decisively passed DSLR shipments by the early 2020s. That shift changed the size, weight, and shape of the gear itself. A Sony A7C II body weighs about 514 grams. A compact 40mm f/2.5 lens weighs around 173 grams. Even professional mirrorless zooms are often 20 to 40 percent lighter than their DSLR equivalents.
But bags were still being designed around DSLR dimensions. The result was the divider identity crisis: thick foam walls surrounding much smaller gear, leaving wasted space and rattling equipment. A camera that should feel nimble became bulky again-not because of the camera, but because of the bag.
The industry has responded, slowly, with folding "origami" dividers, magnetic closures, ultra-thin high-density foam, and modular camera cubes that can be removed or reconfigured. The goal is no longer maximum protection. It's flexibility across different kinds of days: commute, shoot, meeting, gym, flight. The divider system has to support a photographer who carries a camera, a laptop, a jacket, and lunch in the same bag.
That's a cultural shift, not just a mechanical one. The photographer is no longer a separate species of pack animal hauling a dedicated camera vault. The divider system now has to disappear when it isn't needed.
What Foam Actually Does: A Short Physics of Padding
To rebuild a divider system intelligently, it helps to understand what foam actually does.
When a camera falls, it carries kinetic energy. A 1.5-kilogram camera dropped from one meter hits the ground with about 14.7 joules of kinetic energy-not a huge number, but enough to cause real damage if that energy is released in a fraction of a millisecond.
The job of a divider is to stretch that release over a longer distance. In blunt terms: force equals energy divided by stopping distance. If the camera stops in 1 millimeter, the average force is enormous. If a foam pad gives it 10 or 15 millimeters of controlled crush, the average force drops by an order of magnitude.
That's why thickness isn't the whole story. The foam needs to compress through its full thickness without bottoming out. Once a divider bottoms out, it stops being protective-it's just a hard wall with a thin layer of squashed padding. Too soft, and a heavy lens crushes the foam immediately. Too stiff, and the foam transmits force rather than absorbing it.
Material matters too. Open-cell polyurethane foam absorbs impact well but can lose resilience over time. Closed-cell foams like EVA and cross-linked polyethylene resist compression set and perform better under repeated load. The best modern dividers often use dual-density construction: a softer layer nearest the gear to prevent scratches and absorb light knocks, and a firmer core farther out to stop heavier impacts from reaching the bag's shell.
There's also a less obvious function of dividers: load path. In a backpack, a properly placed divider system can keep a heavy 70-200mm zoom low and centered, close to your spine. That reduces the torque that pulls your shoulders backward and strains your lower back. A poorly arranged divider system-say, a heavy camera body floating in the top third of the bag-does the opposite. It turns your gear into a lever working against your body.
So the divider system isn't just padding. It's a structural interface between your body, your equipment, and the ground.
Rebuilding Your Divider System Around Access, Not Anxiety
Most photographers never reconfigure their dividers after the first day. They put the bag together, then spend years living with the result. That's a mistake. A divider system should be treated like a camera setting, not a one-time installation.
Here's the framework I use when setting up a bag.
- Use dividers as lanes, not boxes. Instead of making a tight foam box for every lens, create three broad zones: a fast-access body-and-lens zone, a secondary lens zone, and an accessories zone. Use dividers to separate those zones, but leave open space within them. This reduces friction while still preventing gear from colliding.
- Match foam thickness to mass. A 300-gram prime lens does not need the same padding as a 1.5-kilogram professional zoom. Heavy items benefit from dual-density or high-density closed-cell foam. Light items can sit in thinner dividers or padded wraps. Over-padding small gear just wastes volume and makes the bag heavier.
- Pay attention to the bottom and corners. The most damaging impacts usually occur when a bag is dropped or set down hard. Make sure there's a real bottom pad underneath the gear, not just fabric. Vertical dividers should create a slight suspension so that camera bodies don't rest directly on the lowest seam, where impact force concentrates.
- Check for compression set. Foam wears out. If a divider no longer springs back after you squeeze it, or if it's visibly thinner than it used to be, it has lost much of its protective capacity. In heavily used bags, dividers may need replacing every three to five years. This is especially true for bags kept in hot cars or packed tightly for long periods-heat and constant load accelerate compression set.
- Time your lens changes at home. Put your bag on the floor or table, pick up your camera, and time yourself changing from a wide lens to a standard lens, then back again. If it takes longer than about six seconds, or if you have to look away from the room to complete it, reconfigure the dividers. The goal isn't speed for its own sake. It's that a lens change should be low-stakes enough that you'll actually do it when the moment calls for it. If changing a lens feels like a procedure, you'll stop changing lenses. And then the bag has dictated your photography.
The Next Divider: Lattice Foam, Smart Modules, and the Disappearing Armor
The divider system is not finished evolving. Several emerging trends point toward a very different future.
One is material science. Shear-thickening foams like D3O, already used in some protective equipment and phone cases, are flexible during normal handling but stiffen instantly on impact. That property is almost ideal for a camera divider: thin and supple when you reach for a lens, rigid when the bag hits the ground. The cost is still high, but prototypes suggest it will eventually migrate into high-end bags.
Another trend is custom lattice inserts. With 3D scanning and printing, it's becoming possible to create foam-like structures with precisely tuned compression curves in different axes. Instead of a generic grid of Velcro dividers, a photographer could scan their exact kit and receive a custom insert with a dedicated socket for every body, lens, and battery. No wasted space, no friction, and better impact absorption per gram than a flat slab of foam.
Smart dividers are also on the horizon. Embedded RFID tags could tell you which lens is in which compartment, confirm that your memory cards are packed, or alert you when you've left a battery behind. Humidity sensors could detect the conditions that lead to fungus. These features won't improve your photography directly, but they remove the mental load of bag management-which is, in its own way, a creative benefit.
At the same time, cameras are becoming more sealed, more solid-state, and more resilient. That may reduce the need for thick impact protection and shift the divider system's role toward workflow support: organization, power routing, quick access, and hybrid carry for video and stills. The bag may become less armor and more mobile workspace.
The Bag Is Never Neutral
The fundamental argument remains the same. A divider system is never neutral. It either reduces friction between you and the photograph, or it adds friction in the name of protection. The best system is not the one with the most foam-it's the one that makes your gear feel like an extension of your hands.
That has been true since the first photographer unbuckled a wooden case, and it will still be true when tomorrow's dividers stiffen themselves a millisecond before impact.
So before you buy another bag, look inside the one you already have. Ask what its dividers are telling you. Are they asking you to be careful, or are they asking you to be ready? Are they protecting your gear from the ground, or are they protecting you from the hassle of changing a lens?
Because the answer is already stitched into the foam. And if you don't like what it says, it's time to rip the dividers out and build a bag around the way you actually shoot.