A camera cube (or “ICU” — internal camera unit) is a padded, divided box that turns any backpack or duffel into a camera bag. Because the cube’s interior is the actual fit constraint, cubes are the easiest camera-carry product to reason about — if your gear fits the cube, it fits any bag the cube fits into.
The two-stage fit
- Does your gear fit the cube? Compare your body and lenses against the cube’s published interior width × height × depth.
- Does the cube fit your bag? Cube exterior vs. your pack’s interior. Brands that sell both (Shimoda, f-stop, WANDRD, Peak Design) size these to match.
Our fit checker handles stage one for every cube and insert we track, using each product’s published interior dimensions.
Reading a size chart honestly
- Interior, not exterior. A cube’s outside dimensions include padding; only the interior tells you what fits. We only record interior figures, and flag anything else “unverified”.
- Tapered depth. Some inserts (for example the f-stop Slope) are deeper at one end. We use the shallower depth to decide whether an item physically fits and the average for capacity — the conservative choice.
- Version drift. Interior dimensions can change between versions under the same name. Peak Design’s Camera Cube V2 is about 2 cm shallower than the V1. We stamp every dimension with the date we checked it.
Rough size guide
| Size | Typical interior depth | Good for |
|---|---|---|
| Small / slim | ~7–11 cm | One mirrorless body + 1–2 small primes |
| Medium | ~12–15 cm | Body with a mounted 24-70/24-105 + a spare lens |
| Large | ~16 cm+ | Two bodies or a 70-200-class zoom |
Use the guide to narrow down, then confirm the exact numbers on the fit table. Verdicts are planning estimates from published specs, not guarantees.