How to Photograph the Moon (and Why Yours Comes Out as a White Dot)

Almost everyone has tried it. The moon is enormous and detailed and hanging right there, you lift your phone, and you get back a small white blob with no features at all. The gap between what you saw and what you captured is wider for the moon than for almost any other subject.

There are two reasons, and once you understand them the fix is straightforward.

Reason one: the moon is a daylight subject

This is the counterintuitive part, and it is the single most useful thing to know. The moon is a sunlit rock. The sun is illuminating it exactly as brightly as it illuminates a rock on Earth at midday. It looks dazzling only because it sits against a black sky.

Your camera, pointed at a night scene, sees mostly darkness and does the sensible thing: it opens up and exposes for the dark. The moon, being a daylight-bright object in that frame, is then wildly overexposed and clips to featureless white. You did not fail to capture the detail — you erased it with too much light.

Photographers have a rule of thumb for this called the Looney 11 rule, borrowed from the older Sunny 16 rule for daylight. Set your aperture to f/11 and your shutter speed to one over your ISO — so at ISO 200, use 1/200 of a second. That will put you close enough to a correct exposure to fine-tune from. If your first attempt still looks blown out, shorten the shutter speed until the craters appear.

Reason two: the moon is small

The moon spans about half a degree of sky. That is genuinely tiny — roughly the width of your little fingernail held at arm's length, and small enough that you could fit a hundred and eighty of them between the horizon and the point directly overhead. It feels much larger than that, which is a perceptual illusion rather than a fact about the sky.

At a typical phone's wide-angle focal length, half a degree occupies a handful of pixels. No exposure adjustment will recover detail that was never sampled. You need focal length: 200mm is about the minimum for a recognisable moon, 400mm gives you a satisfying one, and 600mm or more fills the frame. A spotting scope or a telescope with an adapter goes further still.

A working starting point

• Shoot in manual mode. Every automatic mode will be fooled by the dark surroundings.
• ISO 100 to 200. There is abundant light; you do not need sensitivity, and low ISO keeps the image clean.
• Aperture f/8 to f/11. Most lenses are sharpest a little stopped down, and depth of field is irrelevant at this distance.
• Shutter speed 1/125 to 1/250 as a starting point, then adjust by eye until the surface shows texture rather than glare.
• Focus manually. Autofocus hunts badly on a small bright object against black. Use live view, zoom in on the screen, and adjust until the edge of the disc is crisp. Do not simply twist the lens to the infinity mark — most lenses focus slightly past it.
• Use a tripod, and trigger with a timer or remote. At 400mm, pressing the shutter button by hand introduces visible shake.
• Shoot RAW if you can. The dynamic range headroom matters when recovering the brightest areas.

Stop photographing the full moon

This is the advice most likely to improve your results immediately, and it is the opposite of what most people assume.

At full moon the sun is almost directly behind you from the moon's point of view, so the light strikes the surface head-on. Head-on light casts no visible shadows, and without shadows a landscape of craters and mountains reads as a flat, washed-out disc. It is the lunar equivalent of using an on-camera flash.

What you want is the terminator — the line dividing the lit portion from the dark. Along it, the sun is rising or setting on the lunar surface, so every crater rim and ridge throws a long shadow across the ground behind it. The result looks genuinely three-dimensional. A first quarter or last quarter moon puts the terminator straight down the middle of the disc and gives you the most dramatic image available. A gibbous moon is also excellent.

The practical upshot: check the phase before you plan a session, and pick a night somewhere between crescent and gibbous rather than the one everybody photographs.

Getting the moon and a landscape together

A frame-filling moon on black is impressive once. The photographs people actually respond to place the moon behind something — a ridgeline, a building, a tree — for scale and context. Those are harder, and they are mostly a planning problem rather than a technical one.

The key fact is one of the more useful pieces of lunar timekeeping: the full moon rises almost exactly at sunset, because full moon is the point at which the moon sits opposite the sun. So for a few minutes at moonrise you have a bright moon low on the horizon and enough remaining daylight on the landscape for both to be exposed in a single frame. Wait an hour and the gap between the moon's brightness and the ground's becomes too wide to hold together.

Two further points. Shoot from a long way back with a long lens — distance plus focal length is what makes the moon look large relative to a foreground subject, and standing close to your foreground with a wide lens produces the opposite. And a waxing crescent works beautifully for this too, low in the west just after sunset, with earthshine faintly filling the unlit portion.

If you only have a phone

You can still do better than the white blob. Tap and hold on the moon to lock focus and exposure, then drag the exposure slider down substantially — usually most of the way. On many phones this alone will reveal the maria, the dark patches that make up the face. Use whatever true optical zoom the phone has and stop there; digital zoom past that point is interpolation, not detail. Brace the phone against something solid, or use a small tripod clamp.

The best value upgrade is not a new phone but a pair of binoculars: hold the phone camera to one eyepiece, steady it, and let the binoculars do the magnifying. It is fiddly and it works surprisingly well. Be aware, too, that several phone manufacturers now apply machine-learning enhancement to detected moons, which can mean the detail in your shot was partly supplied by the software rather than the optics.

Common mistakes

• Leaving the camera in an automatic mode and wondering why the moon is white.
• Shooting through a window. Glass costs you sharpness and often adds a reflected double image.
• Using a very long shutter speed. The moon moves visibly against the sky; beyond a second or two at long focal lengths you will record motion blur.
• Photographing the full moon and concluding your lens is not sharp enough.
• Over-sharpening afterwards, which turns crater rims into bright halos.