Photographing through the fence: technique, aperture and tricks against distracting wire mesh

The A321 taxis to the holding point in beautiful side light, the registration is razor sharp – and a fine gray diamond pattern lies over the whole fuselage. Almost every spotter knows this picture. The fence belongs to the airport like the runway, and at many spots there is no elevated vantage point that reaches over it. The good news: Photographing through the fence is not a matter of luck but optics with clear rules. This guide goes deeper than the general overview of fence and glass: fence types, the ratio of wire to lens opening, difficult subjects, editing – and the rules of the game that apply at the fence.

The short answer

A fence disappears from the picture when three things come together: The front element sits right at the mesh, the aperture is wide open and the aircraft is far behind. Then the wire is so extremely out of focus that it spreads across the whole opening of the lens. It no longer covers anything but only takes away a little light and contrast. Long focal length, a perpendicular view through the mesh and a small focus point turn “mostly” into “almost always.”

Why the fence can disappear at all

A lens renders every point of the subject across its entire opening, not through a tiny hole in the middle. If a wire lies right in front of the lens, it blocks only a narrow strip of this opening. The light from the aircraft still gets through the rest and produces a complete image – just a bit darker and lower in contrast.

The size that matters is the entrance pupil: the effective diameter of the aperture opening, seen from the front. You estimate it as focal length divided by f-number. A 100–400 mm zoom at 400 mm and f/5.6 comes to about 71 millimeters, the same lens at 200 mm and f/5.6 only about 36 millimeters. The larger this number relative to the wire thickness, the less is left of the fence.

This gives four adjustment variables that always work together:

• Distance lens to fence: The smaller, the better. As the distance grows, the wire becomes less blurred and shows up as structure.
• Aperture: Wide open maximizes the pupil. If you stop down, you bring the fence back into the picture.
• Focal length: Long focal lengths have a larger opening at the same f-number and a shallower depth of field.
• Subject distance: The farther the aircraft is behind the fence, the farther apart fence and subject lie in focus.

You can roughly estimate how much opening you have relative to your fence here:

Fence types at airports and what they demand

“The fence” is not the same as the fence. Depending on the airport and section, you run into very different constructions, and each has its own tactic.

Fence type	Typical geometry	What happens in the picture	Tactic
Chain-link (diamond mesh)	thin wire of a few millimeters, diamonds of a few centimeters	usually disappears well at long focal length, visible at wide angle or distance	lens centered on a diamond, align perpendicular
Double-wire mesh panel	two thick horizontal wires and one thinner vertical wire, rectangular meshes of 50 × 200 mm are common	double horizontal bars easily show up as a horizontal stripe	lens between the horizontal bars, preferably in the middle of the long mesh
Welded fine mesh	tight mesh, many crossing points	clear loss of contrast, pattern at medium focal lengths	only with a long telephoto and wide open aperture, otherwise change location
Anti-climb protection on top (barbed or razor wire)	wire coils or outriggers on the fence crown	mainly disturbs shots from elevated positions just above the fence	gain enough height or work below it through the mesh
Posts, tension wires, signs	localized	cannot be blurred away, appear as dark blobs	move a few meters along

With standard 6/5/6 double-wire mesh panels, two horizontal wires of 6 millimeters diameter each enclose the vertical 5-millimeter wire from front and back. At every crossing point there are thus three wires one behind the other, and the horizontal pair, through its depth and the light reflections, looks stronger to the camera than the plain wire thickness would suggest. If you place the lens on a horizontal bar pair, you almost always see a bright or dark stripe in the picture. The mesh itself, on the other hand, is long enough that a telephoto fits comfortably in between. Which type is installed at an airport differs greatly, by the way – how airport fences are built and monitored is explained in How airport fences are secured.

Fence technique step by step

At the fence, the order decides. If you only set up the camera when the aircraft is already taxiing, you hit the wrong mesh.

The focus jumps to the wire

The most common annoyance at the fence is not the pattern but the autofocus. Especially when the aircraft is solid white and low in contrast, the camera finds something to focus on faster on the shiny wire. Three countermeasures help:

• A small focus point instead of zone or wide-area autofocus.
• Focus limiter on the lens, if available: Many telephoto lenses have a switch that masks out the minimum focus distance. Then the autofocus cannot even jump to the fence right in front of the lens.
• Pre-focusing: For landings, you can pre-focus on a point on the runway and follow the aircraft from there.

Subjects that get difficult

Not every subject behind the fence is equally rewarding. A long-haul jet on the runway several hundred meters away is ideal. It gets critical when subject and fence move close together.

• Taxiing traffic right at the fence: At some spots, aircraft taxi past only a few dozen meters away. The planes of focus are then closer together, and the wire stays more visible. Here it helps to stay even more consistently right at the mesh and to choose the focal length as long as the subject allows.
• Light aircraft and helicopters: Especially at regional airfields, general aviation aircraft are often parked close to the fence. With such subjects, the technique quickly reaches its end.
• Wide-angle scenes: If you want to show the whole apron with a short focal length, you have a small pupil and a large depth of field. The fence then almost always shows up. For such pictures, you need a vantage point above the fence.
• Backlight on the wire: If the sun is in front of you, the wire lights up brightly and lays a milky veil over the picture. When you have the sun behind you at the spot is covered in the guide Backlight in aircraft photography.
• Heat haze: At the fence, you are often at runway level and shoot flat across hot asphalt. That is not a fence problem but makes the loss of contrast worse – more under Avoiding heat haze.

Smartphone and video at the fence

With a smartphone, a different logic applies. The camera lenses are so small that they usually fit completely into one mesh opening. Then no wire lies in the light path at all, and the picture is clean. All that matters is holding the phone flat and centered against the mesh – on devices with several cameras, the currently active lens must be free. Do not push the phone through the mesh while doing so. You will find the basics of spotting with a phone under Plane spotting with a smartphone.

With video, the fence becomes a bigger challenge because you follow the aircraft over a longer stretch. When panning, the lens travels across different meshes, and the wire briefly shows up as a dark smear. Therefore choose a position from which you can pan the entire sweep through the same mesh, or limit yourself to a short section. Because you often use a longer exposure time per frame for smooth video, you quickly need an ND filter in sun and wide open aperture. Background is in Video settings for aircraft footage and Polarizing filters and other filters.

Fence remnants in editing

Even with good technique, a light gray veil usually remains. You can get it well under control in editing:

• Contrast and black point: A careful tone curve adjustment brings back the depth the wire scattered away.
• Dehaze: The slider works against the milky effect a lit fence produces. Use it sparingly, otherwise the sky becomes unnaturally dark.
• Sharpen with judgment: Fence and shimmer cost micro-contrast. Aggressive sharpening does not bring it back but produces halos – tips under Sharpening aircraft photos.
• Retouch individual lines: A single, faintly visible wire can be removed with repair brushes. With a whole grid, that is rarely convincing.

Shoot in RAW if you want to rescue fence pictures – the extra latitude in contrast and tones is especially valuable here (see RAW or JPEG for plane spotting?). If you want to submit images to photo databases, check their rules on editing and retouching beforehand; an overview is given in Editing photos for JetPhotos and the like. The general workflow from RAW to the finished picture is described in Editing aircraft photos.

Through the fence, over it or somewhere else?

Sometimes the best fence technique is not to photograph through the fence at all.

Height is the most elegant solution. At the Affenfelsen in Hamburg, the rise is enough to shoot over the fence without a ladder, and at the Munich Airport visitors’ hill (Besucherhügel) you are also elevated. At the Zeppelinheim viewing platform at Frankfurt Airport, you are outside the security fence with a view of the landings. Whether a ladder at the fence is okay is covered in the article Ladder, step and tripod at the airport fence; why many spotters carry a ladder anyway is explained in The ladder as a spotter’s tool.

Safety: what is off limits at the fence

The airport fence is not just any property boundary but the airport’s outer security line. Everything you do there is observed – partly by staff, partly by cameras and sensors. For you, that means:

• Lens in front, not in the fence: A centimeter or two of distance is entirely enough optically. There is no reason to touch the mesh.
• Don’t rig wire mounts: Clamps, clips or holders on the fence are off limits, even if they promise a calmer picture.
• Stay calm when approached: Anyone standing at the fence with a big telephoto stands out. Explain in a friendly way what you are doing, and show your pictures if asked. Background is in Big telephoto lens, big suspicion.
• Keep paths clear: Bike and service paths often run along the fence. Equipment does not belong across the path, and cars do not belong on the grass strip.
• Report unusual things: Anyone who regularly stands at the fence sees holes in the mesh or suspicious behavior. Report such things to the airport or the police instead of intervening yourself.

The general rules of the game for spots at the fence are summarized in Proper behavior at the airport fence, and the legal situation overall in Is plane spotting legal?.

What to watch out for

• Always have the lens hood on: At the fence, it is stray light protection and scratch protection in one.
• Don’t stop down “for more sharpness”: What helps in the studio makes the wire visible at the fence. Wide open is almost always the better choice here.
• Teleconverters with care: A converter lengthens the focal length but makes the f-number larger – the opening stays roughly the same. It still brings more reach if the subject is far away; when that is worthwhile is covered in Teleconverters for plane spotting.
• Don’t crowd others out: Good meshes are in demand at busy spots. Taking turns is part of it.
• Note what works: Which mesh, which focal length, which time of day – after a few visits, you know exactly where to place the lens at your regular spot.

Conclusion

Photographing through the fence is a question of geometry. If the wire lies right in front of a large lens opening and the aircraft is far behind, it spreads out as a light veil and hardly disturbs. Distance, aperture, focal length and viewing angle are the adjustment variables, a small focus point and a lens hood the most important helpers. Where physics is not enough – with close subjects, wide angle or tight mesh – height or a different spot is the better solution. And in everything, the rule is: The fence itself stays untouched.