If you have ever gone out for a late-night photo walk in the city, you already know the vibe. The streets are quiet, the neon signs are buzzing, and the wet pavement is basically begging to be photographed. You frame up the perfect shot of an old diner or a glowing streetlamp, confident you just captured something moody and cinematic. But then you get home, pull the files onto your computer, or get your film scans back from the lab, and there it is. Right in the middle of the dark sky, there is a weird, floating, neon-green UFO.

It is perfectly shaped like the streetlamp in your frame, except it is upside down and floating on the opposite side of the image. What you are looking at is called "ghosting." It is incredibly common, super frustrating, and can pretty much ruin the atmosphere of an otherwise perfect night shot. But before you blame your camera and toss it in the closet, let us figure out what is actually causing it.

Ghosting vs. Lens Flare: What is the Difference?

People often use the terms ghosting and lens flare interchangeably, but they are actually a little different. Lens flare looks like a wash of light spilling across your frame. It happens when stray light hits your lens element at an angle, scattering inside the barrel. This usually causes a loss of contrast, washing out the shadows and making the whole image look a little hazy or milky. Sometimes flare looks cool and artistic, especially on sunny days.

Ghosting, on the other hand, is a specific type of internal reflection. Night photography is a massive breeding ground for it. At night, you have bright, concentrated points of light—like streetlights, car headlights, or neon tubes—surrounded by pure darkness. When that intense light enters your lens, a small amount of it bounces backward off the internal glass elements or even the camera sensor itself. Since the rest of the frame is totally dark, those little bouncing reflections show up clearly in your image as defined, colored blobs. They are literally the "ghosts" of the light sources in your frame.

Suspect Number One: Your Protection Filter

Nine times out of ten, if someone asks me why their night photos have horrible reflections, I ask them to look at the front of their lens. If you are anything like me, you probably screw a clear UV filter onto the front of every lens you buy. We do it for peace of mind. We want to protect that precious vintage glass from scratches, dust, and sticky fingerprints. During the day, a decent UV filter is totally invisible and does its job perfectly.

But at night, that filter turns into your worst enemy. Think about the physics for a second. You have your curved lens elements designed to direct light carefully onto the film plane or sensor. Then, you slap a completely flat piece of glass right on the front. What happens when a bright streetlamp hits that combination? The light passes through the flat filter, hits the curved front element of the lens, bounces backward against the back side of your flat UV filter, and then gets pushed right back into the lens.

Because the filter is flat, it acts like a mirror for any light trying to escape back out. This is almost always the cause of those weird, inverted green and orange orbs in your night shots. If you are shooting at night and dealing with intense point-lights, the very first thing you should do is unscrew your UV filter. Tuck it safely in your camera bag and shoot naked glass for the night. I promise you will see an immediate difference.

Suspect Number Two: Vintage Lens Coatings

Let us say you took the filter off, but you are still getting some weird reflections. This is where we need to talk about lens coatings. Modern lenses basically have magic sprinkled on them. Manufacturers use complex multi-coatings on every single piece of glass inside the lens barrel to brutally suppress internal reflections.

Vintage lenses are a different story. If you are shooting on a vintage prime lens from the 1950s or 1960s, it might be single-coated or even completely uncoated. These lenses just do not handle bright, concentrated light as well. The light bounces around between the internal elements because there is no heavy chemical coating to absorb or control it. This gives older lenses their famous "character" and beautiful daylight flares, but it makes them much harder to control during long exposures at night.

By the 1970s and 80s, lens makers started fixing this. Pentax introduced their legendary Super Multi-Coating (SMC), and Canon rolled out their Super Spectra Coating (S.S.C.). If you love vintage glass but want to shoot a lot of night photography, looking for lenses from these eras with advanced multi-coatings will significantly cut down on the ghosts.

The Digital Sensor Bounce

There is one more weird modern quirk to keep in mind, especially if you are adapting vintage film lenses to modern mirrorless cameras. Back in the day, film stock was essentially matte. Light hit the film, and the film absorbed it.

Digital sensors, however, are covered by a shiny, highly reflective piece of glass. When you shoot at night using a digital camera, the bright light travels through your vintage lens, hits the shiny digital sensor, and actually bounces backward. It reflects off the flat rear element of your vintage lens and bounces back down to the sensor again. This creates a very specific type of sensor ghosting that the lens designers in 1975 could never have predicted. It is just part of the charm (and frustration) of adapting old glass to new tech.

How to Test Your Gear at Home

You do not need to wait for a midnight photo walk to figure out what your gear is doing. You can run a simple diagnostic test right in your living room.

• Turn out the lights: Make the room as dark as possible.
• Create a point light: Turn on your phone flashlight and set it on a shelf across the room, pointing directly at you.
• Start with the filter on: Look through your viewfinder or digital screen. Move the camera around so the flashlight moves to the edges of the frame. You will likely see a distinct reflection of the LED jumping around on the opposite side.
• Take the filter off: Unscrew it and see if the ghost disappears. If it vanishes, congratulations, you found the culprit.
• Test the raw lens: If the ghost is still there without the filter, it is an internal lens reflection. Now you know exactly what angle triggers it for this specific lens.

Field Tips for Night Shooters

Ghosting can be annoying, but it shouldn't stop you from shooting at night. Aside from taking off your filters, the easiest fix is just changing your angle. Tiny adjustments matter. Taking half a step to the left or tilting your camera down just two degrees can move the ghost entirely out of your frame, or hide it seamlessly inside the actual blown-out light source where you will never notice it. Alternatively, if you can frame the ghost over a patch of pure black sky or a dark wall, it takes about three seconds to erase it in Lightroom later.

Another massive help is using a lens hood. While a hood will not fix reflections from a streetlamp right in the middle of your shot, it works miracles for keeping stray light from streetlamps just outside your frame from hitting your front element sideways.

Upgrading Your Night Photography Kit

If you have tried taking your filters off, adjusting your angles, and accepting the quirks of vintage optics, but you are still unhappy with your night shots, it might be time to tweak your setup. If you are adapting older glass, stepping up to a later-generation vintage lens with multicoating can dramatically clean up your night-time street photography. You can easily find these reliable performers by searching for a high-quality manual focus lens that fits your style. And honestly, no matter what lens you are using, keeping stray light away from that front element is half the battle. Picking up a cheap but effective lens hood is one of the quickest, smartest upgrades you can make before your next midnight photo walk. Get out there, embrace the shadows, and leave the ghosts behind.