There has been a lot of discussion of ETTR (Expose To The Right) on photographic blogs, websites and all kind of other publications. With this method you expose as high as possible with histogram touching the right edge. Here is one article that goes in depth on this method: http://www.luminous-landscape.com/tutorials/expose-right.shtml.
The idea is that this produces maximum quality digital negative. Often this produces image that looks overexposed and later in post-production supposedly you can lower exposure to get naturally looking image but with higher quality.
While it looks reasonable that this may reduce signal-to-noise ratio, I noticed that this results in images looking too flat and with washed out colors. On my last trip I took two images one normally exposed and one exposed to the right. The scene is extremely simple which helps illustrate the difference in result. In post-production I reduced exposure of the ETTR image to match exposure of the first image. No other adjustments were done to either image. Here are results side-by-side:
Guess which one is which? The one on the left is taken with normal exposure, the one on the right is taken with ETTR and then reduced back exposure to match exposure of the first image. As you can see ETTR image results in less color and less contrast, i.e. lower dynamic range. To confirm this here are the corresponding histograms:
Just by looking at histograms you can see that the range of tonality is greater in normally exposed image as well as greater separation of colors. This seems to disprove the statement that the article I linked at the beginning does that ETTR image has greater dynamic range.
I don’t know about you by I’d rather expose right than expose to the right. This is just another case to demonstrate my main principle in photography: do what you like, what feels right to you. And no matter how convincing a new idea you read somewhere sounds, try it before using it, get your own feeling for it. If you really like it, use it, just make sure it is because you got your own understanding of it not because someone else told you to do it.
UPDATE: I’ve got requests to include original ETTR image with histogram. Here it goes.
vitali prokopenko | fine art 