When selecting an industrial camera, you’ll often see:

30fps, 60fps, 120fps, 200fps……

Many people will think:

The higher the frame rate, the better the camera.

Actually, not necessarily.

What really matters is:

How fast the product runs, how often to take photos, and whether each photo needs to be clear.

What industrial cameras really need to match is the production line’s cycle time, not just a high frame rate.

What does FPS mean?

FPS stands for:

How many images can be captured per second?

30fps = approximately 30 frames per second, 60fps = approximately 60 frames per second, 120fps = approximately 120 frames per second.

Simply put:

The faster the product, the higher the frame rate usually required.

However, there are significant differences across projects.

Static photography and manual loading/unloading—30 fps may already be sufficient.

For a standard pipeline, you can aim for around 60 fps.

High-speed motion and continuous shooting may require 120 fps or even higher.

High frame rates don’t necessarily mean the footage will be clear.

This is the easiest point to get confused.

Frame rateDecide how many photos to take per second.

Exposure timeDecide how long to shoot each image.

If the product runs very fast but the exposure time is too long,

Even with a camera capable of 120 fps, the footage can still exhibit motion blur.

At high speeds, an excessively long exposure time can easily result in noticeable motion blur.

Therefore, what high-speed detection truly needs to be paired with is:

High frame rate + short exposure + a sufficiently bright light source.

Longer exposure times limit the achievable frame rate and also make motion blur more likely on moving subjects.

Why does it say 120fps, but I can’t even hit that in practice?

The camera says:

Up to 120fps

It doesn’t mean 120 fps can be achieved under all settings.

In practice, it will also be subject to:

Exposure time, resolution,ROI, interface bandwidth, bit depth

Affected by various factors.

For example, the larger an image is, the more data needs to be transmitted.

So:

High resolution + high frame rate

It places higher demands on both the camera interface and computer performance.

If you want to increase the frame rate, try using ROI.

If the entire image is:

2448 × 2048

But in reality, only a small central region needs to be inspected,

This can reduce the ROI.

When the camera reads out fewer regions, the data volume decreases, and the maximum frame rate of many area-scan cameras also increases. According to Basler’s documentation, on most cameras—particularly when reducing the ROI height—the maximum frame rate can be significantly improved.

If only a local region is being inspected, there’s no need to read the entire image every time.

So how do you choose in the end?

Don’t get hung up on whether to start at 30fps or 120fps.

First, let me ask three questions:

How many products pass through per second?

How many photos do I need to take for each product?

Does the product produce motion blur during operation?

Then determine the required frame rate.

Finally, remember:

Frame rate determines how fast you shoot.

Exposure determines whether the shot will be clear or not.

The light source determines whether the image is bright enough at short exposure times.

The frame rate of an industrial camera isn’t always better the higher it is,It’s only truly suitable when it’s sufficient and stable.