Live View

Live view is a mode that shows the scene on the camera's rear screen in real time, using a feed direct from the image sensor. The photographer composes and focuses on the screen instead of through an optical viewfinder. The preview can show exposure, white balance, and depth of field as they will be recorded, which removes much of the guesswork from a shot.

A DSLR normally reflects light up to the optical viewfinder with a mirror. Turning on live view flips the mirror up and opens the shutter, so light falls on the sensor the whole time. The sensor then streams its feed to the rear screen. Pressing the shutter button closes and reopens the shutter to record the photo.

Mirrorless cameras are in live view all the time. Without a mirror, the sensor always sees the scene, and both the rear screen and the electronic viewfinder display its live feed. This is why a mirrorless camera can show exposure changes, focus aids, and depth of field in the eyepiece as well as on the screen.

On older DSLRs, yes. Their live view relied on contrast detection on the sensor, which hunts back and forth and is slower than the phase-detection system behind the mirror. Modern DSLRs and all mirrorless cameras have fast on-sensor autofocus, so live view focusing is quick and can detect faces and eyes across the frame.

Usually, when exposure simulation is turned on. The screen brightens or darkens as settings change, so the preview matches the file the camera will record. There are limits: flash exposures cannot be previewed because the burst has not fired yet, and some cameras pause the simulation in certain modes. A live histogram helps confirm the reading.

Tripod work, macro photography, and awkward shooting angles. On a tripod, the big screen makes precise framing and manual focus easier. In macro work, magnifying the preview confirms sharpness on tiny subjects. With a tilting screen, live view allows shooting from waist level, near the ground, or overhead without kneeling or guessing.

Yes. The sensor, image processor, and screen all run continuously while live view is active, which uses more power than an optical viewfinder. The drain matters most on DSLRs, where the optical path uses almost no power. Photographers who rely on live view often carry a spare battery or turn the mode off between shots.

Rear screens have limited brightness, and direct sun reflecting off the glass overwhelms the image. Raising screen brightness helps but costs battery. Common fixes include shading the screen with a hand or hat, using a clip-on loupe, or switching to a viewfinder, which blocks stray light by design.

Yes, it is one of the best tools for it. The preview can be magnified to a small part of the frame, so exact focus on an eye or a flower stem is easy to confirm. Many cameras add focus peaking, which outlines sharp edges in color. Together, magnification and peaking make manual lenses far easier to use.

They show the same sensor feed in different places. Live view usually refers to the rear screen, while an electronic viewfinder (EVF) puts a small screen behind an eyepiece. Both preview exposure and focus in real time. The eyepiece works better in bright light, and the rear screen works better at odd angles.