Dome vs Bullet vs Turret Cameras for Business

Ask three security installers whether you should use dome or bullet cameras and you will get three confident, contradictory answers. That is because the honest answer depends on what you are protecting, how far away it is, whether the camera is reachable by hand, and whether you want people to notice it.

This guide is written for the people who actually sign off on these systems: warehouse and operations managers, IT managers, facility managers and small business owners. It covers what each camera type does well, where each one fails, and which to specify for six common commercial environments. Every recommendation comes with the reasoning, so you can adapt it when your site does not match the textbook.

One thing worth saying up front. In a commercial system, the camera is roughly a third of the decision. The rest is cabling, network, storage, lighting and placement. A well placed 4MP camera on a properly certified Cat6 run beats a badly placed 4K camera every time.

What is a dome camera?

A dome camera houses the lens inside a rounded cover, usually tinted, mounted flush to a ceiling or wall. The shape does three useful things: it hides which way the lens is aimed, it presents almost nothing to grab or twist, and it blends into a ceiling well enough that customers stop noticing it.

Because the housing is a hemisphere, impact force spreads across the whole shell rather than concentrating at one point. That is why domes dominate the vandal resistant market and why almost every IK10 rated camera you will find is a dome.

What is a bullet camera?

A bullet camera is a cylindrical body on an adjustable mounting arm. The shape is not decorative. A longer barrel accommodates a bigger lens and a larger infrared array, which is exactly what you need to see something 60 m away in the dark.

The mounting arm makes bullets easy to aim precisely and easy to re-aim later when a loading bay moves or a fence line changes. Most come with an integrated sun shield, which matters more than people expect on a south facing wall in July.

The third option most guides skip: turret cameras

A turret camera, also sold as an eyeball camera, flat faced dome or mini ball camera, is a ball seated in a base socket. You aim it by rolling the ball and it holds position. The critical difference is what is missing: there is no transparent bubble covering the lens.

That one change fixes the biggest long term weakness of dome cameras, and it is the reason turrets have quietly become the default indoor choice for a lot of integrators. If a quote you have been given lists only domes and bullets, this is the question worth asking.

Why dome night footage degrades, and turret footage does not

Understanding this properly is worth two minutes, because it explains a maintenance cost most buyers never see coming.

In a dome camera, the infrared LEDs and the lens sit behind the same polycarbonate bubble. When the LEDs fire, most of that light goes out to the scene, but some of it scatters off the inside surface of the bubble and travels straight back into the lens. The result is veiling glare: a milky haze across the image, or a bright halo around the centre, that destroys contrast exactly when you need it.

Manufacturers deal with this by fitting a foam or rubber gasket ring that seals the LED compartment off from the lens compartment. When the bubble is seated correctly, the gasket compresses and blocks the light path. It works well, and a good dome looks perfectly clean at night on day one.

The problem is what happens next:

• The gasket compresses permanently and loses its seal over a few years of heat cycling
• Anyone who opens the camera to re-aim or clean it may not reseat the bubble squarely
• Fine scratches accumulate on the bubble from cleaning, and each one scatters light
• Dust, grease film and salt haze build on the inside and outside of the cover

Each of those reopens the light path a little. Night footage gets progressively hazier while daytime footage still looks fine, so nobody notices until an incident happens after dark and the recording is unusable.

A turret has no bubble in front of the lens, so there is no surface for the light to bounce off. There is no gasket to fail and no cover to scratch. Night performance on day one and in year seven is effectively the same.

Full three way comparison

Why you can barely find an IK10 turret

This comes up constantly on tenders that specify IK10 across the board, and the reason is structural rather than commercial.

A dome bubble is a curved shell. When something strikes it, the force spreads across the whole curve and dissipates. A turret presents a flat or slightly recessed face. A strike on flat glass concentrates force at the contact point, and once a crack starts it propagates across the panel. You can build a flat face that survives 20 joules, but it becomes thick, heavy and expensive, so almost nobody does.

The practical consequence: if a position needs genuine vandal resistance, the answer is a dome. There is no point specifying IK10 and then accepting a turret substitution, because the substitution is not equivalent.

Cost over the life of the system, not the purchase price

Domes and turrets cost roughly the same to buy. The difference shows up over the seven to ten years you will actually run the system, and it runs in the turret’s favour in every position where vandalism is not a real risk.

Which of the three should you specify?

Dome vs bullet: full comparison

Count them up and it is close to even, which is exactly the point. The shape is a tool, not a ranking. What decides the outcome is matching each tool to each position on your site.

The spec that matters more than shape: pixels on target

Here is the thing almost no camera brochure explains clearly. Resolution on its own tells you nothing useful. What matters is how many pixels land on the thing you care about, measured as pixels per foot, or PPF.

The arithmetic is simple:

PPF = horizontal pixels of the camera ÷ width of the scene in feet

A 4K camera watching a 100 ft wide yard gives 38 PPF. A plain 1080p camera watching a 20 ft wide doorway gives 96 PPF. The 1080p camera will identify a face; the 4K camera will not. Same site, and the cheaper camera wins because it was pointed at a smaller scene.

North American practice generally follows the DCRI figures above. The European standard, EN 62676-4 or DORI, is more lenient and sets identification at roughly 76 PPF. If a supplier quotes DORI numbers, expect slightly less detail than the North American targets suggest.

Where each type wins

Retail stores

Retail has two separate problems that pull in opposite directions. You need enough detail to identify a shoplifter or a dishonest employee, and you need the space to feel welcoming rather than policed. That balance is why retail leans dome heavy inside and bullet heavy outside.

The other thing to understand about retail is that a large share of loss is internal. Cameras aimed only at the door and the aisles miss the till, the stockroom and the back door, which is where a lot of it actually happens.

Offices and professional space

Offices are the lowest risk environment on this list and the one where privacy expectations are highest. The goal is usually access control support and incident evidence, not blanket monitoring. Staff who feel watched at their desks will make that your problem.

Keep cameras on entrances, corridors, comms rooms and anywhere assets or confidential records are stored. Leave open plan desk areas, break rooms and quiet rooms alone. This is not just good manners, it is what Canadian privacy law expects, and we cover that in more detail below.

Warehouses and distribution centres

Warehouses are the hardest environment on this list and the one where the dome versus bullet question genuinely matters. You are dealing with ceilings at 25 to 40 ft, racking aisles 100 ft long and 8 ft wide, dock doors where everything of value enters and leaves, and often very poor lighting between shifts.

The mistake almost everyone makes is mounting everything at ceiling height. From 30 ft up, a person is a hat and a pair of shoulders. You get detection and nothing else. The fix is to split the job.

Split the job three ways

• Overview cameras high on the structure or roof steel, wide lens, 20 to 30 PPF. These tell you where to look.
• Aisle cameras mounted on the racking uprights at 10 to 13 ft, not the ceiling. A bullet with a varifocal lens down a long aisle gives usable detail the whole way.
• Choke point cameras at dock doors, the pedestrian door, the cage, the returns bench and the office, at 8 to 10 ft and 60 to 100 PPF. These are the ones that resolve disputes.

Aisles longer than about 65 ft need a second camera partway down, otherwise pixel density at the far end collapses below anything useful.

Manufacturing and production facilities

In production environments the deciding factor is usually not security at all. It is the atmosphere the camera has to survive: dust, steam, oil mist, washdown chemicals, vibration, extreme temperatures, and in some plants, explosive atmospheres.

Cameras here do double duty. Security is one use, but process monitoring, safety incident review and quality dispute resolution often deliver more day to day value. That changes where you put them.

Schools, colleges and training campuses

Education sites combine three awkward requirements: high vandalism risk, large numbers of minors with strong privacy protections, and buildings that are busy by day and empty by night.

Vandal resistance dominates the specification. Anywhere a camera can be reached by a student standing on a chair, bench or friend’s shoulders needs an IK10 rated dome. This is the clearest case on this list where dome wins outright.

Banks, credit unions and financial branches

Financial sites are the most heavily specified environment here. Requirements come from insurers, regulators and internal audit, and they are usually written down. Get a copy before designing anything.

Face capture is the whole game. Every person entering must be identifiable, every teller position covered, and ATM activity recorded to a defined standard. Retention is typically 30 to 90 days rather than the 14 to 30 days common elsewhere, which has a direct effect on storage sizing.

Other business types at a glance

Where a turret is the better call, by sector

The sector plans above name a camera type for every position. This table pulls out the specific places in each environment where a turret beats a dome, and the places where it must not be substituted.

IP and IK ratings explained

Two ratings appear on every commercial camera datasheet and they measure completely different things. Suppliers sometimes quote one and stay quiet about the other.

IP rating: sealing against dust and water

Two digits. The first is dust, the second is water. Higher is better on both.

For outdoor use anywhere in Canada, treat IP66 as the minimum and IP67 as the sensible choice on exposed elevations. Freeze and thaw cycling drives moisture past marginal seals in a way a milder climate never would.

IK rating: resistance to impact

IK measures how much of a hit the housing survives, in joules.

Mounting heights and placement

Placement decides whether a camera produces evidence or just footage. The most expensive camera in the building is worthless if it is looking at the top of everyone’s head.

Lighting matters as much as the camera

• Never point a camera straight at a window, a glass entrance or the low winter sun. Backlight turns everyone into a silhouette, and wide dynamic range only partly rescues it.
• A modest improvement to site lighting usually beats a camera upgrade, and costs less.
• Infrared produces monochrome images. If clothing or vehicle colour matters to you, provide white light instead.
• Sodium and some LED car park lighting distorts colour badly. Check what the camera actually sees at night before signing off.

Cabling, power and network

This is where commercial camera projects quietly go wrong, and it is the part a camera brochure will never mention. Cameras are the visible end of an infrastructure job.

The cable

• Cat6 solid copper is the practical minimum for new commercial camera cabling. Cat6A is the better choice where runs are long or PoE loading is high, because heavier conductors mean less voltage drop and less heat.
• Never accept copper clad aluminium. It has far higher resistance, fails the conductor requirements in ANSI/TIA-568, and causes cameras that boot fine on the bench and fail at the end of a long run.
• 100 m is the hard limit for an Ethernet channel, and that is the routed length including drops and service loops, not the distance on the drawing.
• Outdoor and underground runs need cable rated for the environment, plus surge protection where a run leaves the building.

The power

Most commercial cameras run on Power over Ethernet, so the switch has to have the budget for them. A fixed dome might draw 6 to 9 W, while a heated PTZ can draw 50 to 70 W and needs 802.3bt. Add up the whole load, add the power lost in the cable, and leave 20 to 30 percent spare.

Our PoE power calculator does that arithmetic, including the voltage drop on long runs, which is the figure that catches most people out on a warehouse or campus site.

Storage and retention

Storage is driven by camera count, resolution, frame rate, compression and how long you keep footage. As a rough planning figure, a 4MP camera recording continuously at 15 fps with H.265 uses somewhere around 15 to 25 GB per day. Multiply by cameras and by retention days, then add headroom.

What actually drives the cost

Camera hardware is usually the smallest line on a commercial quote. Understanding where the money really goes makes it much easier to compare proposals that look wildly different.

Canadian privacy rules you need to follow

Commercial video surveillance in Canada sits under PIPEDA federally, with equivalent private sector legislation in British Columbia, Alberta and Quebec. The Office of the Privacy Commissioner publishes guidelines for overt surveillance by private organisations, and they are short and readable. This is a summary, not legal advice, and you should confirm your own obligations.

What the guidelines expect

• Consider whether a less intrusive measure would solve the problem before installing cameras at all
• Establish and document a genuine business reason, and use the system only for that reason
• Write a video surveillance policy covering purpose, camera locations, retention, who can view footage and who is accountable
• Limit the viewing range so cameras capture as little unrelated activity as possible
• Post clear signage before people enter the premises, with a contact for questions
• Store recordings securely, restrict access, and destroy them once they are no longer needed
• Give individuals access to footage of themselves, with other people masked
• Train whoever operates the system on their obligations
• Review periodically whether the surveillance is still necessary

Where cameras must not go

Common mistakes and how to avoid them

How to choose: a practical checklist

Frequently asked questions

Note: Camera specifications vary by manufacturer and model, and the figures here are typical commercial ranges rather than guarantees. The privacy summary is general information for Canadian commercial sites and is not legal advice. Confirm your own obligations under PIPEDA or the applicable provincial legislation, and check any insurer, regulator or licence requirements that apply to your premises.