I feel that I’ve missed something with this exercise and have taken 2 lots of pictures to try to get it right. The first set of pictures was of a row of red railings and I didn’t get the variation in colour I was expecting. I started by taking a photo with my camera set to aperture priority then changed the setting to manual and keeping the same shutter speed, I changed the aperture for each picture as per the instructions. I subsequently discovered that although it was a bright sunny day, the ISO was set to 200, not that should have mattered as the camera would have selected the appropriate shutter speed to give the correct exposure with my chosen aperture. I felt that all of the pictures looked over exposed on the screen although I am currently working on my laptop and never see the same as I do when I use the monitor on my main computer at home.
From left to right the photos are exposed at 1/160 secs and f/13, f/14, f/16, f18 and f/20
For the second set of pictures I chose some blue flowers, chose a shallower depth of field that I did for the railings and again with the camera set to aperture priority took my first picture. With the setting changed to manual and the same shutter speed, in this case 1/80 sec. took 4 more pictures 1/2 a stop apart, 2 above and 2 below the original picture. We are asked to note differences in addition to under to over exposure of the images. The only obvious differences that I can see are that whilst the hue and brightness seem the same, the more exposure the photograph has the more saturated the colour and of course the smaller the aperture,the greater the depth of field. From left to right photographs are exposed at f /6.3, f/7.1, f/8, f/9, f/10