In photography there is one key feature which is exposure. Exposure is the lighting in an image and is all altered by other elements used on a camera. The exposure is made up of three elements which are, ISO, aperture and shutter speed. in this post you will see how only changing one element will not work when the range between each element is so far apart. The one feature i changed was the ISO without altering anything else and here is my results.
when changing one element the best Iso to use in these images are between 200 and 400 iso for the best results. this is shown in the graph in the below image, This is good exposure as the graph shows a central scale.