The below images were shot at Bristol Zoo, the subject, a Male Lion, was laying relatively still so I seized the opportunity to take my three photos for the first part of this assignment. Unfortunately I did not have my tripod so these were taken hand-held, to compensate I had to ensure my shutter speed was high, however all other camera settings were on Auto.
Histogram in sequence
A histogram is a graphical representation of the tonal values of your image. In other words, it shows the amount of tones of particular brightness found in your photograph ranging from black (0% brightness) to white (100% brightness). As you move rightward, tones get lighter. The middle portion of the histogram represents midtones, which are neither dark nor light. Vertical axis of a histogram displays the amount of tones of that particular lightness. Histogram is exposure-dependent, but is also affected by tone curve and other settings. (1)
The levels of change in the comparative histograms is low, however if you look closely you can see the wave of different patterns of light that ripple through the lens. The midtone areas saw the most amount of fluctuation, whilst the black and white areas of the image saw little, if no change. The cause of the ripple effect moving through the midtones is due to the ever changing world around us, no two images are exactly the same. As most of the data shown in the histogram moves through the centre of the graphic, this shows my cameras auto setting did its job correctly, and exposed these images well.