I am photographing an object 4 cm away from the camera using 5MP phone camera. It is being used in macro mode with fixed ISO 100 setting. Automatic White balance is being used along with center-weighted metering. The object and camera are enclosed in a box,so lighting does not change. Even when using fixed flash, different pictures can be seen to be visually different shades. The phone is the Samsung Galaxy Gt-S5380i. Is this normal? How can I prevent this. I need them to be same even after multiple pictures. Thank you, samc
Assuming different shades means the color of each photo varies, I would blame the auto white balance algorithm of the camera. The white balance decision is most likely being made at every shot, and then the answer seems to vary.
If you can set the white balance to a setting on the camera that is static but is a reasonable match for your scene (like outdoors or natural, not sure of the exact options for that phone), you should get consistent results.