Exposure compensation (EC) overrides your camera's auto-metering when the scene fools the meter. Cameras expose for 18% gray — snow looks gray, black subjects look gray, backlit subjects go silhouette. EC corrects this: dial in +EC to brighten, -EC to darken. Use this reference to know exactly how many stops to apply in 20+ common situations.
Scenario Lookup
Quick Reference Table
| Situation | EC Range | Direction |
|---|---|---|
| Snow / bright white | +1 to +2 | Camera underexposes white |
| Backlit portrait | +1 to +2 | Face is underexposed |
| Overcast / open shade | 0 to +0.3 | Often accurate |
| Dark background | -0.7 to -1.3 | Camera overexposes subject |
| Black subject / clothing | -1 to -2 | Camera brightens blacks |
| Intentional silhouette | -1.3 to -2 | Expose for bright bg |
| Stage / spotlight | -0.7 to -1.3 | Meter sees dark stage |
| Green foliage / grass | 0 to +0.3 | Close to 18% gray |
All values for evaluative/matrix metering. Spot metering on 18% gray needs 0 EC.
EC Stop Values Cheat Sheet
How to Use Exposure Compensation Effectively
Exposure compensation is the most underused control on cameras with auto modes. Understanding when and how much to apply can save dozens of exposures from being unusable. The key insight: your camera's meter measures reflective light and tries to turn everything into 18% gray. Your job is to override it when the scene isn't 18% gray.
Reading Your Histogram Instead of the Preview
The LCD preview is not reliable for judging exposure — screen brightness and ambient light fool your eyes. Instead, use the histogram. For a well-exposed image, the histogram should have data spread across the full range with no hard clipping at either end. If the histogram is bunched to the left (underexposed), add positive EC. If it clips the right edge (overexposed), reduce EC. When shooting in bright light where the LCD is hard to read, this is especially important.
ETTR (Expose to the Right)
ETTR is the technique of intentionally slightly overexposing to push the histogram right without clipping the highlights. This maximizes the amount of sensor data captured, reducing noise in shadows when you pull them up in post-processing. For most scenes: add +0.3 to +0.7 EC beyond the meter reading, stop if highlights clip. This works best for RAW shooters; JPEG shooters have less latitude so use ETTR more conservatively.
Spot Metering Changes Everything
When you switch from evaluative/matrix metering to spot metering, EC becomes less necessary — you're telling the camera exactly which part of the scene to meter, so you can meter off an 18% gray card or the subject's mid-tones directly. With spot metering: meter off the subject's skin for portraits, meter off a mid-gray area for landscapes, and only apply EC when that specific tone is not actually mid-gray.
FAQ
Is this guide free?
Yes, completely free with no signup required.
What is exposure compensation?
Exposure compensation (EC) tells your camera's auto or semi-auto modes to intentionally expose brighter or darker than its meter suggests. Cameras meter for 18% gray, so scenes with lots of white (snow, bright sky) come out underexposed and scenes with lots of black come out overexposed. EC corrects this: +EC adds light, -EC reduces it.
How many stops of EC should I use for snow?
Add +1 to +2 stops for snow or bright white subjects. Most cameras will underexpose snow scenes by 1-2 stops to bring the brightness down to middle gray. Start with +1.3 (1 stop + 1/3) and check your histogram.
When should I use negative exposure compensation?
Use negative EC (-0.3 to -2 stops) when: the background is very dark or black, you're photographing a black subject, shooting a silhouette intentionally, or the bright sky is your subject and you want it properly exposed with a dark foreground.
Does exposure compensation work in manual mode?
Exposure compensation only affects auto and semi-auto modes (P, Av, Tv/S). In full manual mode, you control the exposure directly by changing aperture, shutter speed, and ISO yourself — there's nothing for EC to override.
What's the difference between AE Lock and exposure compensation?
AE Lock locks the meter reading from a specific point you choose, keeping exposure fixed as you reframe. Exposure compensation adjusts the meter's overall recommendation up or down but still tracks with the scene as you move. Use AEL when you want to meter off a specific tone; use EC when the overall scene consistently reads too bright or too dark.