ISO
IOS: 1600
IOS: 800
IOS: 400
IOS: 200
IOS: 100
IOS:80
As you can see the difference in lighting and quality is extremly recognisable, The first photographs is well lit and the camera focuses clearly on the candle holder while the second photograph is dark and poorly lit and isnt very good quality as its all been consumed by the darkness.
These photos were done when i set your camera to 'M' mode and the shutter speed was set to 1/100 and the aperture to f/8. I Then changed the ISO from 80, 100,200,400,800,1600. Going from its lowest setting to its highest.
The most effective ISO setting was ISO-800 as it gave out the best balance of quality and lighting for the photograph.
I have learned how to successfully change my ISO setting to create a better photograph. This will be shown in my work as i will often use ISO-800 for my photography.