Sunset is the best time to shoot a silhouette. 1. Put your camera in manual mode. 2. Set your ISO to 100 or 200. To shoot a silhouette point your camera at the brightest part of the sky (please don’t look directly into the sun this could hurt your eyes) and then underexposed the scene by 1 Stop (from the middle of your camera’s exposure scale). (making it darker) by either raising your shutter speed or increasing aperture number.
On an iPhone: Launch the Camera app from your Home screen or Lock screen.
Tap anywhere on the live preview in order to bring up the focus point.
Tap and hold on the exposure button that appears next to it (it looks like the Sun). You’ll now see a slider that allows you to adjust the exposure.
Drag your finger up or down in order to bring the exposure bias up or down — in other words to make the photo lighter or darker. Make sure there is nothing behind your subject to make the escape clean an uncluttered -Lucas