Do any cameras automatically review a shot for blown highlights and then change exposure for the next one?
Asked 10/4/2017
5 views
2 answers
0
I know many photographers take a test shot, check for clipped highlights, and then dial in exposure compensation or otherwise adjust settings. Do any cameras have a mode that automatically takes a photo, analyzes the result for blown highlights, and then changes the exposure settings for subsequent shots? If not, what existing camera features come closest to this workflow?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
8y ago
2 Answers
6
Do cameras have a mode where they take a picture, check if highlights are correctly exposed and then adjust the settings?
Kind of. The mode is called 'automatic exposure'.
Your mistake is to consider blown highlights or clipping as 'unreliability' in the light metering, which in most situations is not the case. Except for under the most tricky lightning conditions, any halfway decent camera has a light meter very well capable of realizing already before taking the picture, that the chosen exposure settings will cause clipping, either in the highlights, in the shadows or both and to make a deliberate choice somewhere inbetween to minimize clipping.
If the scene you are trying to photograph has a higher dynamic range than what the sensor is able to capture, the camera must make a best effort choice and guess where to cave in, clip the image and lose details in highlights or shadows. This decision may not be what the photographer finds best, but that is what you have exposure compensation for.
If the camera had just recognized clipped highlights and reduced the exposure to avoid clipping on the high side of the image, the adjustment would have increased clipping on the low side and caused you to lose more shadow details and that may also not be what the photographer wants. The point is, that it does not really matter if the camera makes the decision before taking the picture (as when using automatic exposure) or if the camera tries to improve a botched exposure by adjusting the settings and taking a new picture automatically (as you seem to want). In both cases, the camera must compromise and choose between loss of highlight or shadow details.
Originally by user10009. Source · Licensed CC BY-SA 4.0
user10009
8y ago
0
Generated from our catalog & community — verify before relying on it.
Not really. Cameras generally do not take a shot, inspect it, and then automatically retake or keep adjusting based on the recorded image.
What they do instead is use automatic exposure metering before the shot. In most normal scenes, the meter is already trying to choose a reasonable compromise. If highlights still blow, it’s often because the scene’s dynamic range exceeds what the sensor can capture, so some highlights or shadows must be sacrificed.
Closest existing features are:
- exposure compensation, to bias auto exposure darker or lighter
- highlight warnings / histogram review after a shot
- auto exposure bracketing, which records multiple exposures quickly
- better metering systems on higher-end cameras
- shooting raw, which gives more latitude for recovering highlights in post
Also, if the light is stable, once you find the right compensation for one frame, it will often remain valid for the next several shots.
So the short answer is: no common camera mode works exactly that way, but metering, exposure compensation, and bracketing are the practical alternatives.
Recommended products
UniqueBot
AI8y ago
Your Answer
Related Questions
Do Nikon cameras have a feature like Canon's Exposure Safety Shift?
How can I reduce harsh sunlight and overexposure with a point-and-shoot camera?
Why don’t cameras automatically choose the full HDR bracketing range?
How can I prevent blown highlights on a Nikon D300?
What does exposure compensation actually change, and is it the same as changing ISO?