Lens flare and ghosting are both caused by bright light bouncing around inside a lens instead of travelling straight to the sensor or film. Flare usually looks like a hazy wash or streaks of light, while ghosting shows up as faint repeated shapes of the aperture. This guide gives plain definitions and simple ways to control both.
What Flare and Ghosting Look Like
A lens is made of several glass elements. Each surface reflects a small share of the light that hits it. When a strong source such as the sun or a street lamp sits in or near the frame, some of that light reflects between surfaces and lands on the image where it does not belong.
- Veiling flare: a milky, low-contrast haze across part or all of the picture.
- Streaks and bursts of light: bright lines or beams that radiate from the source.
- Ghosting: soft, coloured blobs or polygons, often in a line leading away from the bright source. Their shape usually matches the aperture blades.
Why It Happens
Every glass-to-air surface inside a lens causes some reflection. Lenses with many elements, such as zooms, have more surfaces and so more chances for stray light. Dirt, dust, fingerprints and scratches on the front or rear element scatter light as well and make the haze worse.
Lens makers apply coatings to cut these reflections, and a lens hood blocks light that comes from outside the frame. Neither removes the problem completely when the sun is directly in view.
Ways to Reduce It
- Fit the lens hood and make sure it matches the lens.
- Clean the front and rear elements gently with a blower and a proper lens cloth.
- Remove stacked filters, since each extra piece of glass adds reflecting surfaces.
- Change your position so the bright source sits just outside the frame, or hide it behind a tree, building or other object.
- Shade the lens with your hand or a hat, taking care that it stays out of the picture.
- Try a slightly different focal length or a smaller aperture, which can change the shape and strength of the effect.
When Flare Can Help
Not every photographer wants to remove it. Some use flare on purpose to add warmth, mood or a sense of sunlight in portraits and landscapes. If you want the look, shoot toward the light, move slightly until the effect appears where you like it, and check the result on the screen.
Quick Comparison
| Effect | Typical look | Main help |
|---|---|---|
| Veiling flare | Low contrast haze | Lens hood, clean glass |
| Streak flare | Lines of light from the source | Change angle or block the source |
| Ghosting | Repeated soft shapes | Remove filters, shift position |
FAQ
Is flare a sign that a lens is faulty?
No. All lenses can flare when a strong light is in or near the frame. Some designs handle it better than others, but it is a normal optical behaviour rather than a defect.
Can I fix flare in editing?
Mild haze can be reduced by adjusting contrast and blacks. Strong ghosting or streaks are harder to remove, so it is easier to prevent them while shooting.
The Short Version
Flare and ghosting come from light reflecting inside the lens, and they are most likely with bright sources in or near the frame. Use a hood, keep the glass clean, remove extra filters and change your angle. If you like the glow, use it deliberately.
