Hyperfocal Table

A Hyperfocal Table is a reference chart of hyperfocal distances for your sensor size across common focal lengths and apertures. The hyperfocal distance is the closest focusing distance that keeps objects at infinity acceptably sharp. Focus there and everything from half that distance to infinity falls within the depth of field. Landscape and architectural photographers use it to get front-to-back sharpness in the field without guesswork or working through the formula by hand.

Choose your sensor size and your unit, meters or feet, then click Generate Table; a full-frame table in meters appears when the page loads. Find the row for your focal length and the column for your aperture to read the hyperfocal distance. Switch to manual focus and set that distance on the lens scale, or autofocus on something at about that distance and then switch to manual to lock it. Each value comes from H = f² / (N × c) + f.

Sensor size sets the circle of confusion, the largest blur spot that still looks like a sharp point in a normal print. Smaller sensors are enlarged more to reach the same print size, so they need a smaller circle. The table uses 0.030 mm for full frame, 0.020 mm for APS-C 1.5x, 0.019 mm for APS-C 1.6x, 0.015 mm for Micro Four Thirds, 0.011 mm for 1-inch and 0.008 mm for 2/3-inch sensors. Read the row for the real focal length of your lens, not its full-frame equivalent.

Use it when your composition has both a strong foreground and a distant background that should look sharp, as in wide-angle landscapes with rocks or flowers close to the camera and mountains on the horizon. Focus on the foreground and the mountains go soft; focus at infinity and the foreground loses detail. Focusing at the hyperfocal distance gives you the greatest depth of field, with everything from half that distance to infinity acceptably sharp.

Hyperfocal distances rely on a traditional standard of acceptable sharpness, set by the circle of confusion. That standard was meant for normal print sizes, so on a high-resolution sensor viewed at 100 percent, distant detail can look slightly soft. To favor the horizon, focus a little beyond the listed distance and accept slightly less sharpness in the nearest foreground, or stop down one more stop. Choosing a smaller sensor size in the menu also gives you a stricter, more distant figure.

The table gives you a single exposure with the greatest depth of field your settings allow. It is fast, needs no post-processing and works with moving subjects such as water or foliage. Focus stacking blends several frames focused at different distances, which can give sharper results from the nearest foreground to infinity while staying at an aperture where diffraction is low. It needs a static scene, a tripod and extra editing time, so the table is often more practical in changing conditions.

Both matter, but focal length has the bigger effect, because it enters the formula squared while aperture enters it directly. Doubling the focal length roughly quadruples the hyperfocal distance, while stopping down one full stop shortens it by about 30 percent. On full frame at f/8, a 16 mm lens gives about 1.08 m (3.55 ft), while a 200 mm lens gives about 167 m (547 ft), far too distant to keep a close foreground sharp in the same frame.

The direction of any error matters most. Focus slightly closer than the hyperfocal distance and infinity falls outside the depth of field, so the horizon turns soft. Focus slightly beyond it and you lose a little sharpness in the nearest foreground, while the background stays sharp. Because a soft horizon is usually more distracting in a landscape, it is safer to err on the side of focusing a little past the listed distance.

Very small apertures such as f/22 cause diffraction, where light spreads as it passes through the small opening, which lowers contrast and fine detail across the whole frame, even inside the depth of field. Focusing at the hyperfocal distance usually lets you keep the scene acceptably sharp at a moderate aperture like f/8 or f/11, where most lenses resolve the most detail. The table still lists f/16 and f/22, so you can see how much extra depth they buy.

Many autofocus lenses have no distance scale. Instead, find an object at roughly the listed distance, such as a rock, a patch of grass or a mark on the ground. Autofocus on it, then switch the lens or camera to manual focus so the focus stays where it is. Recompose and take the shot. Pacing the distance out, or using your camera's focus distance display if it has one, helps you estimate it.