Answer:
Sometimes auto mode can change the lighting and make the image have the incorrect lighting aspect that you were trying to achieve. It's also better to use manual mode because occasionally automatic will not focus on the subject you want it to focus on, but with manual you can choose where you want the camera to focus.
One reason is take Creative Control over your pictures.
Another reason is to help deal with tricky lighting.
Finally to get consistent exposures.
Step-by-step explanation:
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