Zone focusing

What you can set in advance

Imagine you see someone approaching and already know roughly where you want them in your photo. A few meters away. You can wait for that moment and then focus. You can also focus on that distance in advance.

That second option is the basis of zone focusing.

You switch to manual focus and choose a fixed distance, such as 2 to 3 meters. An aperture like f/8 or f/11 gives you an area in front of and behind that distance that is also acceptably sharp. That area is your focus zone.

Your subject doesn’t have to be at that exact distance. You have some room to work within the zone. Check how much room you have with a depth of field scale or calculator. The number “3 meters” alone doesn’t tell you enough.

Why it works on the street

On the street, people move through your frame. With zone focusing, you don’t have to refocus for every passerby. You wait until someone enters your chosen zone and take the photo.

That takes waiting for autofocus out of the process. You can watch what’s happening, where someone is walking, and when you want to press the shutter.

That seems like a helpful way for a beginner to divide the work. Set up the technical side first, then look. There’s already enough happening on the street without having to think about focusing again for every photo.

Zone focusing isn’t a required part of some street photography exam, either. You can try it and see whether it suits you. Using autofocus is perfectly fine. Thankfully, that’s one less article of photographic faith to worry about.

Start with distance and aperture

The previous article covered setting up your camera for street photography. Zone focusing adds another choice: at what distance do you want to photograph?

A useful starting point is about 3 meters, with a wide-angle lens such as a 23mm on APS-C or a 35mm on full frame. At f/8, that gives you a generous focus zone. Treat it as a starting point for practice, not a setting that solves every photo.

Here’s how you can start:

1. Switch to manual focus.
2. Focus at about 3 meters.
3. Choose f/8.
4. Use a depth of field scale or calculator to check how far your zone extends in front of and behind that distance.
5. Take a few test photos with subjects at different distances within that zone.

You can also use f/11. Check the zone and your exposure again if you do. Distance and aperture work together: when you change something, you want to know how that affects your room to work.

I’d stick with one setting for the first exercise. If you adjust something different after every photo, it gets hard to understand what you’re actually practicing.

Reading the depth of field scale

A distance indicator tells you where you’re focusing. A depth of field scale helps you see how much of the area around that distance will be acceptably sharp at your chosen aperture.

You’re looking for two limits: the nearest distance within your zone and the farthest. You want your subject somewhere between them.

If your depth of field scale has aperture markings, look at the markings for the aperture you’re using. At f/8, read the corresponding distances on either side of the focus distance you’ve set.

If you can’t read the zone on a scale, use a depth of field calculator. Calculate the zone for your camera, focal length, aperture, and focus distance.

That sounds like homework. It is, a little. But you don’t have to redo the calculation for every passerby. Knowing in advance which distances you can work within is the whole idea.

Hyperfocal distance, without the headache

With zone focusing, sooner or later you’ll come across the term hyperfocal distance. Quite a mouthful for something that’s fairly simple to explain.

It’s the distance you focus at so that everything from half that distance to infinity is acceptably sharp.

Suppose a calculator gives you a hyperfocal distance of 6 meters for your settings. If you focus there, the zone extends from 3 meters to infinity. Those 6 meters are just an example calculation here, not a recommended camera setting.

The word acceptably matters in that explanation. It doesn’t mean everything will be equally sharp everywhere.

You don’t have to start using hyperfocal focusing right away, either. For a subject a few meters away, you can simply choose a zone around that distance. The farthest point in your photo doesn’t automatically have to determine where you focus.

For now, it’s enough to understand the difference: with zone focusing, you choose a useful area of acceptable sharpness. The hyperfocal distance gives you a zone that extends to infinity.

In focus doesn’t mean frozen in place

Someone can walk right through your focus zone and still look blurry in the photo. Zone focusing takes care of focus. Movement still calls for an appropriate shutter speed.

For people walking, 1/250 second or faster is a common guideline. For fast movement, consider 1/500 second.

Keep checking your shutter speed when you’re working at f/8 or f/11. You can use aperture priority or shoot in manual mode with Auto ISO. Set an upper limit for Auto ISO.

That ties in with the previous article: aperture, shutter speed, and ISO still determine your exposure together. Zone focusing lets you take care of one part in advance, but the rest of your settings still matter.

What about a gray fall or winter day?

You’re outside, everything is gray, and at f/8 and 1/250 second, your camera needs a high ISO. That happens at dusk, too. You can still use f/8, but you don’t have to stubbornly stick with it. The weather hasn’t read your settings, after all.

You can open the aperture wider, to f/5.6, for example. Your focus zone will get smaller. Check the limits again with your depth of field scale or calculator, and keep your subject closer to the distance you’ve focused at. Choosing a closer focus distance also makes the zone narrower. Distance, aperture, and zone remain connected.

Another option is to raise the upper limit for Auto ISO and accept a little more noise. Look at your own photos to decide what level you’re comfortable with. I’d rather judge that from a photo than from the number on the screen alone.

A slower shutter speed can work for people or objects that aren’t moving. For people walking, 1/250 second or faster remains the guideline for avoiding motion blur. Standing still yourself isn’t enough when someone is walking through your frame.

If the zone gets too narrow to work comfortably, you can also switch to autofocus with a wider aperture. There’s no fixed recipe for a gray day. Try something and review your photos. Then you’ll see whether that choice works for you.

Practice judging those few meters first

Start with a stationary subject. Estimate where 3 meters is, focus there, and take a photo. Look at the result. Repeat with something closer and something farther away, within the zone you’ve established.

This connects the numbers to what you see in front of you. Eventually, “about 3 meters” should be something you can estimate without a lengthy consultation with the sidewalk.

Then try a place where people walk through your chosen zone. Keep the same focus distance and aperture. Watch for someone entering the zone and take your photo there.

Afterward, check whether your subject was within the zone and whether your shutter speed was fast enough. Change one thing at a time on your next attempt. That makes it easier to judge what helps.

In the next article, we’ll take this outside: Your first hour on the street.