Exposure compensation (EV) allows you to manually adjust the camera’s automatic exposure to be brighter (+) or darker (−), for example with snow (+1 to +2 EV) or dark scenes (−1 to −2 EV). After shooting, the value should be reset to 0. Alternatively, you can use exposure lock or a gray card for precise exposures. Exposure bracketing helps in uncertain lighting and enables HDR images.
Category: Photography Basics > 3. Exposure & Camera Settings Article ID: 3.8 Created: May 2026
Key Points at a Glance
- Exposure compensation (EV +/-) lets you intentionally adjust the camera’s automatically calculated exposure to be brighter (+) or darker (−)
- Typically used for: snow, white subjects (+1 to +2), dark scenes (−1 to −2), and backlighting
- Reset the value back to 0 after shooting—otherwise all subsequent shots will be incorrectly exposed
Explanation
What is Exposure Compensation?
Exposure compensation is a value that allows you to manually override the camera’s automatic exposure calculation. It is given in EV steps (Exposure Values), usually in one-third increments—typically from −2 to +2 EV, and on some cameras from −5 to +5 EV.
- +1 EV → image is one exposure stop brighter than automatic
- −1 EV → image is one exposure stop darker than automatic
- 0 EV → automatic exposure unchanged
The camera internally adjusts shutter speed and/or aperture accordingly, depending on the selected exposure mode.
When is Exposure Compensation Needed?
Automatic exposure metering assumes a reference value of 18% gray (→ article 3.6). In the following situations, reality deviates so much that compensation is necessary:
| Situation | Problem | Compensation |
|---|---|---|
| Snow, white beach, bright walls | Camera underexposes → snow appears gray | +1 to +2 EV |
| Wedding dress, white paper | Camera underexposes → white appears gray | +1 EV |
| Dark background (e.g., stage) | Camera overexposes the main subject | −1 to −2 EV |
| Backlighting (sun behind the subject) | Subject becomes a silhouette | +1 to +2 EV (or flash) |
| Sunset | Camera overexposes → colors look washed out | −1 to −2 EV |
Exposure Lock as an Alternative
If your camera doesn’t have a direct exposure compensation button (or you want finer control), you can use exposure lock:
- Point the camera at a mid-tone area in the scene (e.g., gray surface, skin tone)
- Half-press the shutter button → exposure value is locked
- Recompose the shot to the actual subject
- Fully press the shutter button
The photo is taken with the locked exposure values—not those of the actual framing.
Note: Half-pressing often also locks focus. For moving subjects or if focus and metering should be on different areas, it’s better to use manual focus.
The Gray Card: Professional Calibration
A gray card is a reference card with exactly 18% gray—the reference value for camera exposure. Procedure:
- Hold the gray card filling the frame in front of the camera (same lighting as the subject!)
- Activate exposure lock
- Point the camera at the subject and shoot
Result: The subject is exposed exactly as the camera’s meter intends—without being influenced by dominant bright or dark areas. Especially useful in studio photography, product photography, and challenging lighting conditions.
Exposure Bracketing
In uncertain lighting or when the camera’s monitor is unreliable for judging exposure, an exposure bracket is worthwhile: multiple shots of the same subject with different exposures (e.g., −1, 0, +1 EV). Many cameras offer this automatically (AEB = Auto Exposure Bracketing).
Additional benefit: Exposure brackets can later be combined into an HDR image that shows details in both bright and dark areas (→ article 8.8).
Practical Tip
Always reset the exposure compensation dial to 0 after shooting—this is the most common beginner mistake. If your camera has a physical exposure compensation dial, check it briefly after each session. Alternatively: set the auto ISO limit so the camera raises ISO in low light rather than ignoring exposure compensation.