He filmed for forty minutes feeling calm about it. The picture on the camera's small screen looked sharp, the light was good, and the talking flowed.
At home he opened the file on a computer screen and saw what he had not seen on location: his eyes were soft and his right ear was sharp. The camera had focused on his ear.
He reshot the next day, and this time a different problem appeared: the shot was sharp at the start, then went soft and came back, then soft again. The camera was hunting for focus every time he moved his hand.
The lesson after two days: softness is not one problem but six causes, and each has a different fix.
First: separate three things that look alike on screen
Diagnose before you treat. Three problems give the same impression of a soft picture:
Focus error: something in the frame is sharp and something else is not. Its sign is that there is one sharp place in the picture, in the wrong spot.
Camera shake: the whole picture is soft to the same degree, with a trace of movement. Its sign is that lines look stretched in one direction.
A low shutter speed: the moving subject is soft and the still background is sharp. Its sign is that a moving hand smears while the still body is clear.
Open a soft shot and zoom in: is there any sharp place in the picture? If yes, the problem is focus. If no, the problem is movement or shutter.
Six causes of softness
1. You are judging from a small screen. The most common cause and the least believed. The small rear screen is not enough to judge sharpness. And the fix is free: use the camera's magnify function while setting focus, or the focus-edge display if it exists, which draws coloured lines on the sharp parts.
2. Autofocus is hunting. The camera refocuses whenever something in the frame changes: your hand moves, somebody passes, the light shifts. So you get a breathing shot: soft, sharp, soft.
3. It focused on the wrong thing. Autofocus picks the nearest object or the clearest edge, not necessarily your eyes. So the ear is sharp and the eye is soft, or the microphone is sharp and the face is soft.
4. Too wide an aperture. A wide aperture gives a beautiful background and makes the sharp distance very narrow. So moving five centimetres back takes you out of focus. The relation between aperture and the other settings is in camera basics and the exposure triangle.
5. You move and the focus does not. If you lock focus and then move, you leave it. And this is the most familiar problem in talking to camera: you set focus while looking at the screen, then sit down and talk with your body moving naturally.
6. Not enough light. Autofocus needs contrast to work, and in low light it hesitates and hunts. One extra light solves a focus problem before it solves a lighting problem.
The answer that suits most talking-to-camera videos
If you film yourself seated or standing in one place, the best answer is locked manual focus, in this order:
- Put something in your place: a chair, a mark on the floor, a water bottle.
- Then sit in your actual position yourself.
- Magnify the image in the camera on your eye and set focus manually until you can see the lashes.
- Lock the focus and do not touch it.
- Stop the aperture down a step or two, which widens the sharp distance and lets you move naturally.
- Mark the floor or the chair, and return to that mark after every break.
Step five is the one people skip. A very soft background looks beautiful in stills, and in video it turns every natural movement into a technical error.
And when autofocus is right
Autofocus is better in three situations:
- Moving shots: you are walking or following something that moves.
- Fast filming with no time to set up.
- A camera or phone with reliable face or eye tracking that you have tested and know holds.
In those cases, set three things if you can: choose face or eye tracking, reduce the transition speed so the shot does not breathe, and shrink the focus area rather than leaving it across the whole frame.
Phones: two points that solve most of it
Press and hold on the spot to lock focus and exposure together. Most camera apps do this, and it is the difference between a stable shot and a breathing one.
Use an app that gives you manual control if you film often. Locking focus on a phone matters more than any other setting, because phones are the most inclined to refocus for no reason.
A twenty-second check before every shot
Do this and most of this article disappears from your life:
- Magnify on the person's eye, or on the most important detail in the frame.
- Set focus, then lock it.
- Record five seconds, stop, and watch them magnified.
- Then film.
Five seconds that test forty minutes. And most people who filmed forty soft minutes did not lose sharpness; they lost those five seconds.
What the edit can fix and what it cannot
It cannot. No tool makes a soft shot sharp, and what sharpening tools do is emphasise edges, which improves a slightly sharp shot and ruins a fully soft one.
What you can do with a soft shot is three things: shorten it to two seconds, use it under narration with a cutaway over it, or delete it. Which is why you always film an alternative for every important scene.
Sharpness is not everything
A last point to keep your balance: a sharp shot that says nothing is worth less than a softer shot that says something. And if you have to choose between a real moment that is soft and a repeated moment that is sharp, the real moment wins in documentary.
The right order: set what you can set before you film, then pay attention to what is happening in front of you. Where to put the subject in the frame is the subject of composition and framing, and what concerns shake and camera movement is in camera movement and stillness.
In four sentences
Diagnose first: focus, shake, or shutter. For talking to camera, lock manual focus on your eye and stop the aperture down a step. For moving shots, use tracking with a small area. And test with five seconds before every shot, because those seconds are cheaper than reshooting a whole day.