Those cameras are called dome cameras or PTZ cameras, depending on their shape and how they work

The round, half-dome shaped cameras you see mounted on bank ceilings are called dome cameras because of their distinctive rounded housing. The name comes from the clear or smoked plastic dome that covers the lens — it protects the camera while letting it film in all directions. You cannot easily tell which direction the camera is actually pointing, which is partly why banks use them.

Some of the older bank cameras you might notice are PTZ cameras, which stands for "pan, tilt, zoom." These cameras can move left and right (pan), up and down (tilt), and zoom in on details from far away. A security guard or manager can control them from a desk, moving them to follow activity or get a closer look at a specific area. PTZ cameras are usually larger and more visible than dome cameras, often mounted on walls or in corners where the movement is obvious.

Key Takeaways

  • Dome cameras are named for their round, protective housing and are mounted flush to the ceiling so you cannot see which direction they are pointing.
  • PTZ cameras (pan, tilt, zoom) can move and zoom, and a person can control them from a security desk to follow activity or zoom in on details.
  • Banks use dome cameras because the hidden direction makes people uncertain about whether they are being filmed, which deters theft.
  • Older PTZ cameras are larger and more visible, while modern dome cameras are often smaller and blend into the ceiling.

Why banks chose dome cameras over other designs

Banks started using dome cameras in the 1980s and 1990s because they solved a real problem: people behave differently when they know exactly where a camera is looking. If a camera is mounted on a wall pointing at the teller line, someone planning to rob the bank knows to avoid that angle. A dome camera mounted in the center of the ceiling creates uncertainty — you cannot tell if it is watching the teller, the vault, the entrance, or all three.

The dome housing also protects the camera from dust, moisture, and tampering. A customer cannot easily reach up and cover the lens or break it. The plastic dome is also harder to see through from certain angles, which adds to the uncertainty about what the camera can actually see.

How PTZ cameras work and why they are less common now

A PTZ camera has motors inside that move the lens in different directions. A security officer sits at a desk with a joystick or keyboard and can pan the camera left or right, tilt it up or down, and zoom the lens in or out — all in real time. This was valuable when banks had only a few cameras and needed them to cover large areas, or when a security guard needed to follow a suspicious person through the building.

Modern banks use PTZ cameras less often because fixed dome cameras are now cheaper, require less maintenance, and can cover more area when you install several of them. PTZ cameras also need someone actively watching to be useful, while a dome camera records everything whether anyone is watching or not. However, you will still see PTZ cameras in some banks, especially in the vault area or at the main entrance where a guard might need to zoom in on a customer's face or ID.

The difference between what you see and what is actually recorded

An important detail: the camera you see mounted on the ceiling is only part of the system. The actual recording happens on a digital video recorder (DVR) or network video recorder (NVR) — a box usually kept in a locked room behind the teller line or in the bank manager's office. The camera sends video through wires (or wirelessly in newer systems) to that recorder, which stores the footage on a hard drive.

Banks keep this recording equipment locked away for the same reason they keep the vault locked — the footage is evidence, and it needs to be protected. If someone steals the recorder or the hard drive, the video is gone. This is why banks also keep backup copies of important footage, sometimes stored off-site or in the cloud.

What changed in bank camera technology over time

The oldest bank security cameras, from the 1970s and early 1980s, were large and obvious — often mounted on brackets that stuck out from the wall. They used film or analog video tape, which meant someone had to physically change the tape every few hours or days. The image quality was grainy, and you could not zoom in on details without losing clarity.

Dome cameras arrived in the 1980s and became standard because they were smaller, less obvious, and worked with new video technology. By the 1990s, banks switched to digital recording, which meant footage could be stored for weeks or months instead of hours. Modern cameras are even smaller and higher resolution — a camera the size of a smoke detector can now record clear enough video to read a person's face or the serial number on a bill from across the room.

Why you might still see older cameras in some banks

Not every bank has upgraded to the newest camera systems. Older dome cameras and PTZ cameras still work fine, so banks often keep them running until they fail. Replacing a camera system is expensive — it means new cameras, new wiring, new recording equipment, and often hiring a technician to install it all. A bank that has been in the same building for 20 years might have cameras that are 15 years old but still recording everything that happens.

You might also notice that some banks have a mix of old and new cameras. They might have upgraded the entrance and teller area with modern dome cameras but kept the older PTZ camera in the vault area because it is still useful for that specific job. Over time, as old cameras fail, banks replace them with newer models, but the transition happens gradually.

Frequently Asked Questions

Can I tell if a dome camera is actually recording?

Not reliably. A dome camera with power is almost always recording — there is usually no light or indicator that tells you whether it is on or off. Some cameras have a small red light, but many do not. The safest assumption is that any camera you see in a bank is recording.

Why do some dome cameras have a red light and others do not?

Banks choose whether to include a visible light based on what they want to communicate. A red light makes it obvious the camera is on, which can deter theft. No light makes people uncertain, which also deters theft because they do not know if they are being watched. Both approaches work, so it depends on the bank's security philosophy.

Are PTZ cameras better than dome cameras?

They are better at different things. A PTZ camera can zoom in on a specific person or area in real time, which is useful if a guard is actively watching. A dome camera covers a wider area automatically and records everything, which is better for reviewing what happened after an incident. Most modern banks use dome cameras because they require less staff and cover more ground.

How long does a bank keep security footage?

This varies by bank and by law. Federal regulations require banks to keep footage for at least 90 days, but many banks keep it for six months to a year. Some keep it longer if they have the storage space. You can request footage of a specific incident by asking the bank manager, though they may require a police report or court order depending on what happened.

Can someone disable a bank camera?

It is difficult and illegal. Cameras are mounted high on ceilings or in corners where they are hard to reach. Tampering with a camera, blocking it, or destroying it is a federal crime in most cases because it interferes with bank security. Banks also have backup cameras and recording systems, so disabling one camera does not stop the recording.