Ansel Adams created the Zone system, a process of capturing a series of dark to light tones in an image. This would maximize the effect of an image giving it more drama and allowing each aspect in a photo to stand out for itself.
We edited our own photos with same outcome by removing saturation, altering contrast and brightness and balancing the levels of black, white and grey tones.
In Digital Photography, ISO measures the sensitivity of the image sensor. The lower the number the less sensitive your camera is to light and the finer the grain. Higher ISO settings are generally used in darker situations to get faster shutter speeds.
A contact sheet contains thumbnail images of all the photos in a shoot. This makes it very easy for both the photographer and his/her viewers to look at the photos that you have taken. This is useful for the photographer to select the images that they prefer in a shoot. Contact Sheets can be included in a photographer’s project to make it more professional.
How to make a Contact Sheet?
Open Adobe Bridge and choose the images that you want to make a contact sheet with
Go to Tools, Photoshop and Contact Sheet II
Unselect Font and Choose the number of columns and rows that you want your photos to be arranged in