Focus Bracketing: Capture a Stack of Sharp Frames

What is focus bracketing?

Focus bracketing is an autofocus bracketing feature that captures a series of images at different focus distances. Instead of locking focus once, the camera moves the focus in small steps between frames. Each frame in the bracket has a different part of the subject sharply in focus. The frames are meant to be combined later into a single image with a deeper zone of sharpness.

Do not confuse bracketing with stacking. Focus bracketing is the capture step; focus stacking is the merge step. Some cameras also offer in-camera focus stacking, which runs both steps automatically. If you want to control the merge on your computer, focus bracketing gives you that flexibility. See focus stacking for a close look at the merging side.

Because bracketing produces multiple files, it also teaches you how focus distance shapes an image. You can review the sequence to see exactly which part of the subject is sharp at each step.

• Macro subjects such as flowers, insects, stamps and coins
• Small products and tabletop scenes
• Close-up texture or detail shots
• Landscapes with a near foreground and distant background

Why shoot a focus stack?

One frame can only keep one plane in focus. At close distances, the depth of field is thin, so the nearest petal may be sharp while the back of the flower is soft. Stopping the aperture down adds depth of field, but very small apertures can soften the whole image through diffraction. Focus bracketing lets you shoot at the aperture that gives the image quality you want and still achieve front-to-back sharpness in the final merge. See aperture explained and hyperfocal distance.

Focus bracketing is also useful when the subject has depth that is hard to align in one frame, such as a piece of jewelry or a small mechanism. The technique lets you keep the composition and lighting constant while the focus moves through the subject.

How focus bracketing works

The exact menu path depends on the camera, but most implementations let you turn on the feature, set how many frames to shoot, and choose a step size. The step size controls how much the focus distance changes between frames. If the steps are too large, the in-focus zones may not overlap, leaving soft bands in the merged result. If they are too small, you may need many frames to cover the subject.

Some cameras bracket from the closest focus point outward, while others let you choose a starting point and bracket around it. Some models also let you set a delay between frames or shoot the whole series in one burst. Check the camera manual before a shoot so you know whether the camera gives you a focus-distance step, a lens-scale step, or a number of frames setting.

Choosing a camera for focus bracketing

Focus bracketing is not universal. It is most common on interchangeable-lens cameras and advanced compacts that give you full control over focus and lens behavior. If a model is aimed at macro, product, or landscape photography, it is more likely to include a bracketing menu. If it is a basic point-and-shoot, you may need to focus manually or skip bracketing entirely.

When comparing models, start with the best mirrorless cameras guide and look at the full-frame mirrorless and APS-C sections for bodies with advanced focus controls. Micro Four Thirds is also worth a look because the system pairs small bodies with compact macro lenses.

Official camera maker sites are useful for checking how a specific body implements bracketing. Nikon's Learn & Explore, Canon's technology hub, and Sony's Alpha Universe all publish model-level education and product information. If you are building a system, the Micro Four Thirds standard site lists compatible cameras and lenses, which matters when you plan to add a macro lens.

Features that make focus bracketing easier

The bracketing feature works best when the camera has tools around it. Before you buy, consider the features that make the workflow easier.

A step-by-step workflow

The workflow is straightforward: compose, bracket, then merge.

• Mount the camera on a tripod and compose the shot.
• Enable focus bracketing in the menu and choose the closest focus point.
• Set the number of frames and the step size.
• Take the series without moving the camera.
• Import the frames into focus-stacking software or use the camera's in-camera stacking feature.

Focus bracketing vs other tools

Focus bracketing changes only the focus distance. Exposure bracketing changes the exposure across frames and is usually merged for high dynamic range. Multiple-exposure mode combines separate frames in the camera, but it does not change focus. In-camera focus stacking is the closest sibling, since it automates both the bracket and the merge. See exposure bracketing for the other bracketing workflow.

Do not confuse focus bracketing with high-resolution sensor-shift modes. Those modes move the sensor to capture more color detail at the same focus distance; they do not extend depth of field. If your goal is front-to-back sharpness, focus bracketing is the feature you need.

What to pick for your use

Questions

What is the difference between focus bracketing and focus stacking?

Focus bracketing is the capture step: the camera takes a series of frames at different focus distances. Focus stacking is the merge step: software combines those frames into one image with extended depth of field. Some cameras do both steps automatically.

Does every camera have focus bracketing?

No. It is more common on interchangeable-lens cameras and advanced compacts that give you manual focus and lens control. Look in the camera menu and check the manual before you buy.

How many frames should I use?

There is no fixed answer. Use enough frames to cover the scene, with a step size small enough that the in-focus zones overlap. Start with a small bracket and inspect the result.

Do I need a tripod for focus bracketing?

A tripod is strongly recommended. Keeping the camera still makes it easier for stacking software to align the frames. A handheld bracket can work with image stabilization, but any movement between frames reduces the clean area you can merge.

Is focus bracketing the same as exposure bracketing?

No. Exposure bracketing captures the same scene at different brightness levels, usually for HDR merges. Focus bracketing keeps exposure the same and changes focus.

Can I merge focus-bracketed frames in the camera?

Some cameras offer in-camera focus stacking, which takes the bracket and produces the merged file automatically. If yours does not, you can use desktop software. The capture step is the same.