Camera Burst Rate: What Frames per Second Mean

What burst rate means

Burst rate, often called continuous shooting speed, is the maximum number of frames a camera can capture per second. This spec is measured in frames per second (fps). A camera with a higher burst rate can capture a rapid sequence of images, allowing you to choose the exact moment when the action peaks. For example, a fast athlete crossing the finish line or a bird taking off from a branch happens in a fraction of a second; a higher fps gives you more frames to pick from.

Manufacturers often advertise burst rate as a headline feature, but the real-world burst performance depends on several factors, including the mechanical shutter speed, the speed of the image sensor readout, and the camera's processing power. Even if a camera can shoot at a high fps for a short time, it might not sustain that speed for more than a few seconds. Understanding how burst rate works is essential for evaluating cameras for action photography.

Buffer depth: the silent partner

The buffer is the camera's internal memory that temporarily holds photos before they are written to the memory card. When you shoot a burst, the camera processes and stores each image in the buffer. If the buffer fills up, the camera must stop shooting or slow down until it can write data to the card. A deeper buffer allows you to shoot longer bursts before hitting this limit, which is crucial for sports and wildlife where the best moment might come after several seconds of continuous shooting.

Two cameras with the same burst rate can have very different buffer capacities. One might sustain its top fps for a second, while another might keep going for five seconds. The buffer depth is often more important than the burst rate itself. For action photography, look for a camera that offers both a high fps and a deep buffer. Check the camera's specification sheet for the maximum burst length in raw or JPEG format. Also consider the write speed of your memory card, as a faster card can help clear the buffer more quickly.

How many fps do you need for sports?

Sports photography demands a burst rate that can keep up with the speed of the game. The exact number of fps you need varies by sport. For example, baseball pitches and tennis serves are faster than a soccer player running across the field. However, the general rule is that the faster the action, the higher the fps you want. A camera that shoots at a moderate frame rate can still capture good action shots if you time the shutter well, but a higher fps increases your odds of catching the peak moment, such as a ball hitting a bat or a gymnast mid-flip.

For most amateur sports, a camera with a decent burst rate and a reliable autofocus system will serve you well. For professional-level sports, you'll want the fastest burst rates available and a buffer that can sustain them for several seconds. Consider also the autofocus tracking capabilities; a fast burst is useless if the camera can't keep the subject in focus. Many modern mirrorless cameras offer advanced subject detection, which is a huge help for sports. Explore the best APS-C cameras and best full-frame cameras for models that excel in sports photography.

How many fps do you need for wildlife?

Wildlife photography, particularly bird photography, is one of the most demanding genres for burst rate. Animals are unpredictable, and the decisive moment often lasts only a fraction of a second. A high fps allows you to fire a burst when you see a bird take flight or an animal pounce. Many wildlife photographers prefer cameras with very fast burst rates, often pairing them with long telephoto lenses. The combination of speed and reach is key.

But wildlife shooting also requires a camera that can handle low light and has a fast, accurate autofocus system. The burst rate is only one part of the equation. You also need a buffer that can hold a long sequence of raw files, because that gives you the most flexibility in post-processing. If you shoot in JPEG, you might get longer bursts, but raw is often preferred for wildlife to recover highlights and shadows. For more on choosing a camera for wildlife, look at the best mirrorless cameras and best 8K cameras (the latter can also offer high-resolution stills).

Mechanical vs electronic shutters in bursts

The type of shutter your camera uses significantly affects burst rate and how the camera handles fast motion. Mechanical shutters use physical curtains that open and close for each exposure. They have a maximum sync speed and can be subject to mirror-slap (in DSLRs) or shutter vibration, but they are reliable for many situations. Electronic shutters, on the other hand, read the sensor line by line, which allows for higher burst rates because there are no moving parts. However, electronic shutters can produce rolling shutter artifacts, where moving subjects appear skewed or distorted, especially with fast panning or quick motion.

Some cameras offer both mechanical and electronic shutter options, letting you choose the best mode for the situation. For action sports where you need the maximum burst rate, electronic shutter is often the way to go, but you must be aware of potential rolling shutter distortions. For wildlife, you might prefer mechanical if you're not pushing the absolute fps limit. The choice depends on your subject and your tolerance for artifacts. Learn more about the differences in our article on shutter types: mechanical vs electronic.

Choosing a camera for burst shooting

When you're comparing cameras for burst shooting, look beyond the headline fps number. Check the buffer depth for the file format you plan to use, and consider whether the camera has a fast card slot format like CFexpress or UHS-II SD. Also consider the autofocus system's tracking performance, because a camera with a high fps but poor tracking will deliver many out-of-focus frames. A good lens with fast, accurate focusing is equally important.

The right camera for you depends on your subject and your budget. If you photograph sports and wildlife occasionally, you might not need the fastest burst camera on the market. Many modern cameras, including those in the best cameras under 1000 and best cameras under 500 lists, offer respectable burst rates for casual action. If you're a dedicated sports or wildlife shooter, you'll want to invest in a higher-tier model, perhaps from the best 30 to 49 MP cameras or best 50 MP or more cameras. Always prioritize burst rate and buffer together, and test a camera's ergonomics and menu system before making a final decision.

What to pick for your use

Questions

What is a good burst rate for sports photography?

A good burst rate for sports is one that can keep up with the action. Faster is generally better, but the exact number depends on the sport. For most amateur sports, a moderate fps is sufficient, while professional sports often demand the highest fps available. The buffer depth is equally important, as it determines how long you can shoot at that fps.

Does burst rate affect image quality?

Burst rate does not directly affect image quality, but the camera's processing speed can influence how many frames it can handle before the buffer fills. Some cameras may reduce the fps when shooting in raw or when using certain autofocus modes. In general, the burst rate is about how many frames you can capture, not the quality of each frame.

What is the difference between burst rate and continuous shooting speed?

Burst rate and continuous shooting speed are the same thing. Both refer to the number of frames a camera can capture per second in a continuous burst. The term 'burst rate' is often used interchangeably with 'continuous shooting speed' or 'fps.'

Do I need a high burst rate for wildlife photography?

Yes, for wildlife, especially birds and other fast-moving animals, a high burst rate is highly beneficial. It gives you a better chance of capturing the decisive moment, such as a bird taking off or an animal leaping. However, you also need a deep buffer and a fast, reliable autofocus system to make the most of the burst rate.

Why does the buffer matter more than burst rate?

The buffer determines how long the camera can sustain its maximum burst rate. Without a deep buffer, a camera with a high fps will only shoot for a fraction of a second before slowing down. For action photography, you often need to shoot continuously for several seconds, so a deep buffer is critical.