Setting the ISO on your camera is the first step to using your DSLR camera in manual mode. The video below will walk you through the process and explain how the ISO works. Ensure you have your camera manual before you start.
SELECT MANUAL MODE
Before you set the ISO, firstly you will need to dial in the letter M on your camera’s settings. The dial options in red are all auto modes and this is where the camera will choose the setting to achieve the best result for the user. In this mode, the camera will use the jpeg file format.
The blue areas indicated the manual options. P means Program and is the auto setting if you want to use the RAW file format. A means Aperture, S, or TV is for Shutter and M is the manual mode where you need to select the correct setting to take a photograph.
SET ISO FOR THE CONDITIONS
The ISO will need to set for the lighting conditions. It will only need to be adjusted if the lighting conditions change. The ISO setting is designed to allow your camera to operate in low light conditions. If the ISO number is low, it indicates that the light needs to be good as with a sunlit day. Alternatively, a high ISO number will allow the camera to photograph in low light areas such as inside a building. Unfortunately using a high ISO will create camera noise within your image. Using a lower ISO is best where possible.