A flashing exposure indicator or blinking shutter speed or aperture number means your camera cannot reach a correct exposure with the current settings. The fix is usually to change ISO, aperture or shutter speed, or to add or remove light.
What the Warning Really Tells You
Your camera has limits. The lens can only open so wide or close so far, and the shutter has a fastest and slowest speed. When the scene needs more than those limits allow, the display blinks. Depending on the model, the blinking number may be the shutter speed, the aperture or a plus or minus exposure scale. Check your manual for the exact display on your camera.
Common Causes
- The scene is too bright for your fastest shutter speed and smallest aperture at the current ISO.
- The scene is too dark for your slowest allowed shutter speed and widest aperture.
- Auto ISO has a maximum or minimum limit that was reached.
- A flash setting, such as a maximum sync speed, limits your options.
- Exposure compensation is set far from zero.
- A neutral density filter or adapter is changing the amount of light that arrives.
Quick Fixes for a Too-Bright Scene
- Lower the ISO to its base value.
- Close the aperture to a higher f-number.
- Use a faster shutter speed if the camera allows it.
- Add a neutral density filter, or move the subject into shade.
- Check that exposure compensation is not set to a plus value.
Quick Fixes for a Too-Dark Scene
- Raise the ISO, or raise the Auto ISO upper limit.
- Open the aperture to a lower f-number.
- Use a slower shutter speed, with a tripod if needed.
- Add light with a lamp or flash.
- Check that exposure compensation is not set to a minus value.
Other Reasons to Check
| Mode | What may blink | Typical fix |
|---|---|---|
| Aperture priority | Shutter speed | Change aperture or ISO |
| Shutter priority | Aperture | Change shutter speed or ISO |
| Manual | Exposure scale | Move settings toward center |
If the blinking appears with a lens that is not attached properly, or with an adapter, clean the contacts and remount the lens.
Before an important shoot, scan the display for exposure compensation, ISO limits and filter settings, and take a test frame in the light you will be using. Carrying a small neutral density filter for bright days, and a fast lens or a light for dim rooms, covers most of the situations that trigger the warning.
FAQ
Can I still take the photo while it flashes?
Often yes, but the picture will likely be too dark or too bright. Check the playback image and the histogram.
Does it mean the camera is broken?
Usually not. It is a warning about settings and light, not a fault.
The Short Version
A flashing indicator means the scene is outside what your settings can handle. Adjust ISO, aperture or shutter speed, change the light, and check compensation and filters.
