Every picture you take passes through a window before it reaches the sensor or the film: the viewfinder at your eye or the screen on the back of the camera. Learning to use those windows well, and to know when they are telling you the truth, quietly improves every photograph. A blurry viewfinder can be fixed in seconds with a tiny dial. A screen that looks bright at night can hide a dark exposure. The display buttons can turn clutter into useful guides, and a tilting screen can open up angles you would never reach otherwise.
This guide covers the practical side of seeing through a camera: optical and electronic viewfinders, the diopter dial, the eye sensor, display modes and overlays, screen brightness and exposure preview, tilting and touch screens, and simple habits that keep you looking at the scene rather than the gadget.
Viewfinder or screen: two ways of seeing
Most cameras give you two ways to compose. You can hold the camera to your eye and look through the viewfinder, or hold it out and frame on the rear screen. Each has strengths.
| Viewfinder | Rear screen |
|---|---|
| Steadier, because the camera is braced against your face | Lets you shoot from high, low or awkward angles |
| Easy to see in bright sun | Can wash out in strong daylight |
| Shuts out distractions, so you concentrate on the frame | Lets you stay in conversation with the people you photograph |
| Often uses less battery | Larger view for checking focus and composition |
There is no right answer. Many photographers use the viewfinder for most pictures and switch to the screen for unusual angles, tripod work and video. Phones, of course, only have a screen, which is one reason holding them steady takes a little more care. How to hold your camera explains a stable grip for both.
Optical and electronic viewfinders
Viewfinders come in two kinds, and they behave quite differently.
- Optical viewfinders, found on DSLRs, rangefinders and many film cameras, show the scene directly through glass or mirrors. What you see is the real light, with no delay and no battery drain. It does not show how the photo will be exposed, though; you only see that afterward on the screen.
- Electronic viewfinders, found on mirrorless cameras and some compacts, are tiny high-resolution screens inside the eyepiece. They show a live image from the sensor, so they can preview brightness, white balance and depth of field before you press the shutter. They also allow helpful overlays such as a histogram and focus peaking.
The difference between the two is explained in more depth in optical vs electronic viewfinders, and viewfinder coverage explains why some viewfinders show slightly less than the final picture.
The diopter: fixing a blurry viewfinder
If the view through your eyepiece looks soft even when the camera says it is focused, the diopter is almost certainly the cause. It is one of the most common puzzles for new photographers and one of the easiest to fix.
The diopter is a small adjustment that tunes the eyepiece to your eyesight, much like adjusting a pair of binoculars. It does not affect the photo at all; it only changes how sharp the viewfinder looks to you. It usually takes the form of a tiny wheel or slider beside the eyepiece, sometimes marked with plus and minus signs.
- Look through the viewfinder at a bright, plain area, such as a sky or a wall, so the lens focus does not distract you.
- Concentrate on the viewfinder’s own markings: the focus points, the grid lines or the numbers along the edge. These are always in the same place regardless of the lens.
- Turn the diopter slowly until those markings look crisp and clear.
- Stop when they are sharpest. If you go past the point, come back.
Once set, the diopter rarely needs changing, though it can be nudged in a bag. If you share the camera, each person may need to reset it. People who wear glasses can either shoot with them on, using the standard setting, or take them off and dial in the diopter to suit their eyes. Some strong prescriptions fall outside the dial’s range; accessory eyepiece lenses exist for that.
Viewfinder sharp but photos still soft? How to take sharp photos walks through shutter speed, focus and technique.
The eye sensor and eyecup
Cameras with an electronic viewfinder usually have a small sensor beside the eyepiece that switches the display between the screen and the viewfinder as you raise the camera. It is convenient, but it can also confuse.
- The screen goes black unexpectedly. A strap, a hand or your body near the eyepiece can trigger the sensor. Hold the camera slightly away from you, or set the display to switch manually.
- The viewfinder stays dark. Check the display setting; it may be set to screen only.
- A tilted screen confuses it. On some cameras, tilting the screen out disables the sensor so it does not flick back and forth.
The rubber eyecup around the eyepiece blocks stray light, protects your glasses and keeps the view clear. If it goes missing, the viewfinder can look washed out in sun and the eye sensor may misbehave. Replacement eyecups are simple to fit.
Display modes and overlays
Most cameras have a button, often labeled DISP or INFO, that cycles through different amounts of information on the screen and in the viewfinder. Spending a few minutes learning those views is worth it, because the right overlay can quietly improve your pictures.
- A clean view shows only the image. Lovely for composing without distraction.
- A basic view adds the essentials: shutter speed, aperture, ISO, battery and remaining shots.
- Grid lines divide the frame into thirds or squares. They help keep horizons level and make the rule of thirds easy to practice.
- An electronic level shows when the camera is straight. Invaluable for landscapes and buildings.
- A live histogram shows the spread of tones in the frame, which is a far more reliable guide to exposure than the brightness of the screen. How to read a histogram explains it.
- Focus aids such as focus peaking and magnification help with manual focus.
- Highlight warnings flash the brightest areas that have lost detail. Highlight warnings explains how to use them.
Choose two or three views you like and ignore the rest. Too much information becomes clutter, and clutter pulls your attention away from the scene.
When the screen is lying about brightness
The rear screen is a small, bright display that adjusts to the world around it. That makes it a poor judge of exposure.
- At night, your eyes adapt to the dark and the screen looks dazzling. A dark exposure can look perfectly bright, and you only discover the problem at home.
- In bright sun, the screen looks dim and washed out. You may be tempted to brighten pictures that were already fine, overexposing them.
- Screen brightness settings change how photos look on the camera, not how they are recorded. A screen turned up high makes every picture look brighter than it really is.
The cure is to trust the histogram and the highlight warnings rather than your impression of the screen. Leave the screen brightness at a middle setting, and if you find your pictures are consistently too dark or light on a computer, check it first. If you often find dark surprises, why are my photos dark walks through the other causes.
Exposure preview
Electronic viewfinders and live screens can show the image either as it will be exposed, or brightened so that you can see to compose. The first is often called exposure preview or exposure simulation. With it on, the view darkens or brightens as you change settings, which makes learning exposure much more intuitive. With it off, the view always looks well lit, which helps in dim conditions or with flash, where the flash will add light the preview cannot show.
If your screen never changes when you adjust settings, check whether preview is switched off. If you shoot with studio flash and the screen looks black, switch it off. The relationships between the settings are explained in what is exposure.
Tilting, flip-out and touch screens
A screen that tilts or swings out is one of the most useful features a camera can have, because it frees the camera from your eye level.
- Low angles. Tilt the screen up and hold the camera near the ground for flowers, pets, puddle reflections and dramatic architecture, without lying in the mud. Photography angles shows what these viewpoints do.
- High angles. Tilt it down and hold the camera above your head to see over a crowd.
- Self-portraits and video. A screen that faces forward lets you frame yourself.
- Tripod work. A tilted screen saves your neck on a low tripod.
Touch screens add another layer. Tapping the screen can move the focus point, take a picture, or both. On some cameras you can drag your thumb across the screen to move the focus point while your eye is at the viewfinder. These features are wonderful once set up the way you like, and confusing if you trigger them by accident with your nose. Most cameras let you turn touch off for the viewfinder or limit it to part of the screen. The camera menus guide covers the settings worth changing first.
Reviewing pictures without missing the moment
Checking the screen after every shot, sometimes called chimping, is natural when learning. It is also how many moments are missed.
- Check early, then stop. Take a test frame, check the histogram and focus, adjust, then keep your eye on the scene.
- Shorten automatic review. Setting the review time to a second or two, or off, keeps the camera ready.
- Zoom in to check focus. A picture that looks sharp at screen size can be soft. Magnify the eyes or the main subject.
- Review properly later. A computer screen tells you far more than the camera ever can.
Viewfinders on film cameras
Film cameras have no screen to review pictures, so the viewfinder carries everything. Learning to read one is part of the pleasure of shooting film.
- Focusing aids on SLRs. Many manual focus film SLRs have a circle in the middle of the focusing screen. A split-image circle shows the subject broken in two until it is in focus, when the halves line up. A ring of tiny prisms around it shimmers until focus snaps into place. Line up a straight edge in the split circle and the rest follows.
- Rangefinder patches. Rangefinder cameras show a small bright patch in the center with a second, ghostly image. Turn the focus ring until the two images overlap exactly.
- Meter needles and lights. Many film cameras show exposure with a needle, a plus and minus sign, or small lights along the edge of the view. Centering the needle or lighting the middle lamp means the meter thinks the exposure is right.
- Parallax marks. On cameras where the viewfinder sits apart from the lens, small marks near the top corners show where the frame edge falls for close subjects.
The diopter, the eyecup and the habit of keeping the eyepiece clean matter just as much on film. If you are new to film cameras, choosing your first film camera explains the different viewfinder styles.
Prefer to set focus without peering through the viewfinder at all? Zone focusing explains how to pre-focus and shoot by distance.
Caring for the screen and viewfinder
- Clean gently. Use a soft microfiber cloth, the same kind used for lenses. Avoid paper towels and harsh cleaners.
- Use a screen protector. A thin protective film or glass is inexpensive insurance against scratches.
- Close flip screens in the bag. Folding the screen inward protects it from knocks.
- Keep the eyepiece clean. Smudges on the eyepiece make the view look soft and can be mistaken for a focus problem.
- Mind the sun. Never leave a camera with an electronic viewfinder pointing at the sun for long; the concentrated light can damage the tiny display.
The guide to camera maintenance covers cleaning in more detail.
Common mistakes
- Never setting the diopter. A soft viewfinder makes focusing and composing harder than it needs to be.
- Judging exposure by screen brightness. Trust the histogram instead.
- Cranking the screen brightness up. It makes every photo look brighter than it is.
- Too much information on screen. Clutter distracts from composition.
- Touch focus by accident. A nose on the screen can move your focus point.
- Always shooting at eye level. A tilting screen is there to be used.
- Reviewing after every frame. Moments happen while you are looking down.
Try this: a 10-minute viewfinder tune-up
- Minutes 1 to 2: Point the camera at a plain wall, look through the viewfinder and set the diopter until the markings are crisp.
- Minutes 3 to 4: Press the display button repeatedly and note each view. Pick your favorite for everyday shooting.
- Minutes 5 to 6: Turn on grid lines and the level. Take three pictures of a horizon or a doorway, keeping it straight.
- Minutes 7 to 8: Turn on the live histogram. Change exposure compensation and watch the graph move.
- Minutes 9 to 10: Tilt the screen and take one picture from knee height and one from above your head.
Ten minutes, and your camera will feel like a clearer window from then on.
Frequently asked questions
Why is my viewfinder blurry?
Usually the diopter needs adjusting to your eyesight. Turn the small dial beside the eyepiece until the viewfinder markings look sharp.
Does the diopter change my photos?
No. It only changes how sharp the viewfinder looks to you. Focus in the photo is set by the lens.
Why does my screen keep turning off?
The eye sensor thinks your eye is at the viewfinder. Move your hand or strap away from the eyepiece, or set the display to switch manually.
Why do photos look brighter on the camera than on my computer?
Camera screens are small and bright, and they are usually viewed in different light. Check the histogram and keep screen brightness at a middle setting.
Is it better to use the viewfinder or the screen?
Both are useful. The viewfinder is steadier and easier in sun; the screen is better for unusual angles and video.
Can I use a viewfinder with glasses?
Yes. Keep the diopter at the standard setting and press the eyecup gently against your glasses, or remove them and set the diopter to suit your eyes.
For definitions of terms like diopter, live view and histogram, see the photography glossary, and live view explains how the rear screen preview works.