Backlight and silhouettes: how to use the sun behind the aircraft

The sun is low, the spot is on the “wrong” side, and the long-haul jet is taxiing to the runway right in front of the brightest part of the sky. Most people pack up at this point. Yet backlight in aircraft photography is not a write-off but a genre of its own: silhouettes against a glowing evening sky, shining exhaust plumes, outlines that look drawn with a light pen. This guide shows you how to expose such pictures, how to control flares and sunstars, which subjects work in backlight at the airport – and where the limits are.

Backlight in aircraft photography: the short answer

Backlight means: the sun is behind the aircraft, and the side facing you is in shadow. You then have two options. Either you commit to a silhouette and expose for the bright sky so the aircraft becomes a black shape. Or you use semi-backlight, where the sun is at an angle behind the subject and edges, tail and exhaust light up. What does not work is the middle path of indecision: a gray, muddy aircraft against a blown-out sky.

When a spot is in backlight depends on the runway axis, your position and the time of day. The geometry behind it is explained in the guide Planning sun position – there you learn to avoid backlight. Here it is about using it.

Three kinds of backlight at the airport

Not all backlight is the same. For the picture idea, it is worth distinguishing three situations:

Situation	Sun position	What you see	Typical subject
Full backlight	almost exactly behind the aircraft	fuselage completely in shadow, sky very bright	silhouette on approach, outline against sunset
Semi-backlight	at an angle behind the aircraft, 30–60 degrees to the side	bright rim on top, tail and engines	taxiing shot with glowing edges, exhaust plume
Grazing light from behind	low, almost perpendicular to your line of sight	long shadows, texture in the asphalt, gloss on the fuselage	ground shots in the morning, reflections on a wet runway

The degree values are a rough guide, not a fixed limit. What matters most: the farther the sun moves to the side, the more detail the aircraft keeps – and the less dramatic the contrast becomes.

Silhouettes: how to expose correctly

A silhouette works when two things are right: the background keeps color and detail, and the aircraft turns almost black and sharply outlined. As a rule of thumb, a brightness ratio of 16:1 or more between background and subject applies, so at least about four stops. With the sun low directly behind the aircraft, that difference is usually present.

The problem is metering. The camera tries to bring the scene to a middle gray and in doing so brightens the dark aircraft – at the expense of the sky, which then blows out. Hence: expose for the sky, not for the aircraft.

Which aircraft work as silhouettes

A silhouette lives on shape. Types with a distinctive outline are therefore rewarding subjects: the hump of the Boeing 747-8, the full-length upper deck of the Airbus A380, the six-wheel main gear of the Boeing 777-300ER on approach or the raised wingtips of the Airbus A350-900 and Boeing 787-9. Turboprops such as the ATR 72-600 or the Dash 8-400 stand out clearly with their high wing and propellers.

Narrowbody jets are harder: a Boeing 737-800 and an Airbus A320neo differ as a black outline only in details such as the nose, tail cone and winglets. How to read such features is shown in the guides Recognizing aircraft types and Telling Airbus and Boeing apart.

Semi-backlight: outlines, exhaust and vapor

The most exciting backlight pictures at the airport often work not with a full silhouette but when the sun is at an angle behind the aircraft. Then this happens:

• Rim light: The top of the fuselage, the tail edge and the engine inlets get a bright rim. The aircraft separates from the background with a three-dimensional look.
• Exhaust becomes visible: The hot, shimmering air behind the engines scatters the backlight. Especially during the takeoff roll or when taxiing with thrust, the exhaust plume stands out, which would stay invisible in front light.
• Condensation and spray: On humid days, vapor veils form over the wings or at the wingtips. After rain, the landing gear whips up spray. Both glow noticeably stronger in backlight than with the sun at your back.
• Reflections: A wet runway or apron reflects the low sun – the aircraft then stands on a shiny surface. More ideas for such days are in the guide Plane spotting in bad weather.

In semi-backlight, expose a bit more generously than for a silhouette, but protect the bright rims: they are the subject. A correction of zero or slightly negative is a good start, and the rest is control through the histogram and overexposure warning.

Getting flares, haze and sunstars under control

In backlight, strong light hits the front element, and part of it is reflected back and forth between the lens elements. The result is flares: colored rings and polygons whose shape follows the aperture opening, or a milky haze that swallows contrast and color. Modern coatings reduce the effect but do not eliminate it. Lenses with many elements, which means many zooms, are more prone to it than primes.

What you can do about it:

• Always use the lens hood. It blocks light that falls on the front element from outside the frame. It doesn’t help against a sun in the middle of the frame.
• Take off cheap filters. Every additional filter adds two more reflecting surfaces to the system. Simple protective or UV filters noticeably increase flares and ghosting.
• Keep the front element clean. Dust, fingerprints and salt film from spray light up in backlight and scatter the light. A microfiber cloth belongs in your gear.
• Shade with your hand. If the sun is just outside the frame, a flat hand or a cap brim above the lens hood is often enough.
• Shift your position slightly. Even a small step to the side changes where reflections land in the frame. Best of all, hide the sun directly behind the fuselage, tail or wing.

The sunstar as a creative device

If you can’t avoid flares anyway, you can also turn the sun into a star on purpose. For that you stop down a lot, typically to f/11 to f/16, and leave the sun as a small, hard point in the frame – best when it just peeks out from behind an edge. The rays come from the straight edges of the aperture blades: an even number of blades gives as many rays as blades, an odd number twice as many. A lens with nine blades therefore shows a star with 18 rays.

The catch at the airport: at a small aperture the shutter speed gets longer, and sensor spots become visible. Sunstars are therefore easiest with parked or taxiing aircraft and shorter focal lengths. Which focal lengths suit what is in the guide Lens and focal length for plane spotting.

Safety: never straight into the sun

As appealing as backlight is, the sun remains a hazard for eyes and equipment.

In practice that means: set up your composition while the sun is still behind an aircraft, building or tree, and lower the camera between movements. Never lay the camera on your backpack in the sun with the lens uncovered. And stay on public areas in every search for a position – what is allowed around the fence is summarized in Is plane spotting allowed?.

Autofocus and sharpness in backlight

Backlight is demanding for autofocus. A black aircraft against a bright sky has a hard edge but hardly any structure inside. And when a flare haze lies over the image, contrast drops further.

• Aim at the edge: Place the AF point on an outline, such as the cockpit, engine or tail edge – not in the middle of the dark fuselage.
• Check subject detection: Many current cameras recognize aircraft. In backlight, detection can falter; a manually placed, medium-sized AF area is then more reliable.
• Factor in heat shimmer: Backlight over warm asphalt shows the shimmer especially clearly. Shorter distances and the cooler morning hours help.

Typical mistakes – and what helps

Backlight in editing

Backlight pictures benefit especially from RAW files, because the tonal range between sun and shadow is large. Still: don’t try to rescue every silhouette. If you lift the shadows strongly afterward, you bring up noise and color casts, and the picture loses exactly the effect you shot it for.

Sensible steps are a slightly warmer white balance for evening light, careful highlight correction around the sun, local contrast against flare haze and removing sensor spots that become visible at a small aperture. The complete workflow is described in the guide Editing aircraft photos. Once the sun has set, it continues seamlessly with Aircraft at night.

Where and when to find backlight

You rarely have to look for backlight – it comes to you when a spot is on the sun-facing side of the runway. In Central Europe, that is typically the north side of an east-west runway, where you look south. At the Munich Airport visitors’ hill (Besucherhügel), for example, looking south around midday you have backlight – a drawback for front-light fans, an opportunity for silhouettes when the sun is lower later.

Three questions help when planning a spot visit:

• Where does the sun set? In summer in the northwest, in winter in the southwest. Depending on the runway axis, the approach then lies directly in front of the setting sun – or just beside it.
• Which runway direction is in use? That determines whether you have landings or takeoffs in front of the sun. How that works is explained in Understanding runway direction in use at an airport.
• How is the air? Clear, dry air gives a hard, small sun disk and strong outlines. Light haze colors the sky warmer but swallows contrast.

In winter the sun is low all day, and flat, warm light isn’t limited to the evening – one more reason to go out in the cold season too. Tips are in the article Plane spotting in winter. At large hubs such as Frankfurt Airport or Munich Airport, you also have the advantage that widebody jets keep coming into the evening – the best silhouette candidates.

Conclusion

Backlight costs you the perfect side view with a legible registration – and gives you shape, outline and mood in return. What matters is that you decide deliberately: a silhouette with a tight exposure on the sky or semi-backlight with glowing edges. A lens hood, a clean lens and a small step to the side keep flares in check, and a heavily stopped-down lens turns the sun into a star. And through it all: never look at the sun through an optical viewfinder.