Two of the most striking effects you can capture at sunset come from shooting almost directly at the sun. A silhouette reduces a subject to a clean black shape against a glowing sky, and a sun star turns the sun itself into a sharp burst of rays. Both rely on the same situation, a bright sky and a low sun, but they ask for opposite exposure choices. Once you understand what each one needs, you can often get both in the same session.
This guide covers the settings, positioning, and small adjustments that make silhouettes crisp and sun stars sharp.
What Makes a Strong Silhouette
A silhouette works when a dark subject sits against a much brighter background. The trick is to expose for the bright sky and let the subject fall into shadow. That means the shape has to be readable on its own, because all the detail inside it disappears.
- Choose a clean shape. A person standing alone, a lone tree, a cyclist, or a pier reads instantly. Overlapping shapes turn into a confusing black blob.
- Keep subjects separated. If you photograph a group, space people apart so arms and heads do not merge into one mass.
- Show a recognizable profile. A side view of a face or a raised arm tells the story better than a front-on stance.
- Place the subject above the horizon. Crouch low and shoot slightly upward so the figure breaks the bright sky rather than blending into a dark landscape.
Exposure Settings for Silhouettes
You want the camera to expose for the sky, not the subject. The simplest path is spot metering aimed at a bright patch of sky next to the sun, not the sun itself. That reading darkens everything in front of it.
- Mode: Use manual or aperture priority with exposure compensation pulled down by one or two stops.
- Aperture: Around f/8 to f/11 keeps both the subject edge and the background sharp.
- ISO: Keep it low, near 100 to 200, since the sky is still bright.
- Metering: Spot meter on the sky away from the sun, lock that reading, then recompose.
- Flash off. Turn off any automatic flash, which would try to light the subject and kill the silhouette.
If the shape is not fully black, point your meter at an even brighter part of the sky or dial in more negative exposure compensation until the subject goes solid and dark.
How a Sun Star Forms
A sun star is the spike pattern that radiates from a bright point of light. It is created by the blades of your lens aperture, so it has nothing to do with editing. The narrower the aperture, the cleaner and longer the rays. The number of points depends on the lens, with an even number of blades giving that many rays and an odd number doubling them.
- Stop down hard. Use a small aperture like f/16 or f/22. A wide aperture produces a soft glowing blob instead of defined spikes.
- Partly block the sun. Let the sun peek over a horizon, a roofline, or the edge of a rock. A point source half hidden gives the crispest star.
- Use a clean lens. Dust and smudges scatter light and muddy the rays.
Positioning and Timing
Both effects are easiest in the few minutes around sunset when the sun is weak enough to look at briefly but still bright against the sky. Arrive early and find a foreground edge you can tuck the sun behind. A pier post, a branch, the curve of a hill, or a building corner all work as a hiding spot that produces a star while keeping flare manageable.
Move your own position in small steps. Sliding a few inches left or right changes how much of the sun is exposed, and that controls both the size of the star and the amount of flare washing across the frame.
Protect Your Eyes and Your Sensor
Pointing a camera at the sun deserves caution. During the bright part of the day this can damage your eyes and your sensor, so save these shots for when the sun is low and dimmed by the thick atmosphere near the horizon.
- Compose using the rear screen in live view rather than staring through the optical viewfinder at the sun.
- Do not leave the camera pointed at a strong sun for long stretches between frames.
- Take the shot, then lower or turn the camera away while you review it.
Bringing It Together
Silhouettes and sun stars are two rewards from the same low-sun moment. For a silhouette, find a clean shape, lift it above the horizon, and expose for the bright sky. For a sun star, stop down to a tiny aperture and tuck the sun behind an edge. Work in the soft minutes around sunset, move in small steps to fine-tune the light, and keep your eyes and gear safe while you do it. With a little practice you will start to see both shots waiting in almost every evening sky.