Expose to the Right
Using your Camera's Histogram
Summary
Hans Peter Schaub has been a photographer for many years, as well as a working editor for Nature Foto Magazin. Today, Schaub is back to share more insider tips and techniques with FotoTV viewers on his favorite subject, nature photography.
One main focal point of today's interview and demonstration is digital photography and how to correctly use the camera’s histogram to decisively control the exposure. This is done by viewing the histogram which represents the tonal value of the photo being taken and it also gives very clear information about the exposure of the image overall.
Schaub details the necessary steps to ensure proper use of the histogram function. Generally, as Schaub points out "One could assume, with enough experience and sensible presumptions, a digital camera is well capable of representing 6 aperture increments between the brightest and the darkest spots on the histogram."
As a rule Schaub keeps the histogram in view so that he may adjust the ridges or mountainous regions of the histogram, therefore ensuring correct exposure, essential when scaling an image either up or down. Most noticeable however, is scaling a smaller image up to result in a larger image. The loss of quality is greatly visible.
Schaub further goes on to demonstrate different situations how to correct or modify the histogram so the results are exactly what were intended. The histogram or the judging of the histogram has achieved special significance in the photography world for what has now been coined, 'Expose to the right.'

Comments
Historgram can be misleading
On some cameras the histogram shows only the green-channel. On most pictures this doesn't harm, but on some pictures this is not usable. You can have an overexposed red-channel which makes the photo unusable, while the histogram on the camera still shows a perfect histogram (because it shows only the green channel).
I think this should be mentioned in the video even if most modern pro-cameras don't have the problem. There may still be some Nikon D70 and the like users around.
Now i know how it works
If you dont know how your histogram works, after this video you understand it.
After showing the video you never be scary about shooting with higher ISO.
I read also his newest book "Landscape Photography" and i love it.