The Photographer's Guide to Lunar Photography Phases

The Moon is the most photographed celestial object in human history. It's bright enough for any camera, large enough to capture detail even with modest telephoto lenses, and predictable enough to plan shoots years in advance. Yet most lunar photographs are disappointing — a blown-out white disk against a black sky, lacking the crater detail, the sense of texture, and the compositional drama that makes the Moon a genuinely spectacular subject. The secret isn't expensive equipment. It's knowing which phase to shoot and understanding the lunar terminator.

The Lunar Terminator: Where the Magic Happens

The terminator is the line dividing the sunlit and shadowed hemispheres of the Moon — the boundary between lunar day and lunar night. Along the terminator, the Sun is rising or setting on the lunar surface. Craters, mountains, and rilles catch the low-angle light, casting shadows that can stretch for dozens of kilometers across the lunar surface.

Terminator at Different Phases

| Phase | Terminator Position | Crater Shadow Quality | Best For | |-------|-------------------|----------------------|----------| | Waxing Crescent (15-45%) | Left-center of disk | Excellent — long shadows near center | Crater detail, Montes Apenninus, Copernicus | | First Quarter (50%) | Center line (left-right) | Maximum detail — Sun at "lunar sunrise" at terminator | Best phase for surface detail | | Waxing Gibbous (55-95%) | Right edge | Poor — most craters face-on without shadows | Whole-disk context shots, Earthshine | | Full Moon (100%) | None visible from Earth | None — Sun directly overhead at lunar noon | Lunar maria contrast, lunar eclipse photography, wide-field moonrise | | Waning Gibbous (95-55%) | Right edge | Poor | Lunar eclipse, supermoon size comparisons | | Last Quarter (50%) | Center line (right-left) | Maximum detail — Sun at "lunar sunset" at terminator | Best phase for surface detail (different craters illuminated) | | Waning Crescent (45-5%) | Right-center of disk | Excellent — long shadows | Crater detail, Earthshine pre-dawn |

Why First Quarter and Last Quarter Are Best

At First Quarter, the Sun rises over the eastern limb of the Moon (from the perspective of someone standing there). The terminator at First Quarter illuminates the eastern walls of craters while their western walls remain in shadow. Craters near the terminator — Copernicus, Plato, Clavius — display their most dramatic relief.

At Last Quarter, the opposite side of the terminator is illuminated. Craters that were in shadow at First Quarter now catch the light. This is why serious lunar photographers image the Moon at both quarters: different features are visible at each.

During Full Moon, the Sun is directly overhead across the entire visible disk. There are no shadows. Craters appear as flat rings. The entire disk is uniformly bright and contrast is minimal. Full Moon is the worst phase for surface detail — but the best for seeing albedo features (the dark maria, the bright rays of Tycho crater) and for moonrise/moonset compositions where the full disk rising over a landscape creates a dramatic silhouette.

Camera Settings for Lunar Photography

The Looney 11 Rule

For a properly exposed Full Moon, use the Looney 11 Rule: at f/11, set your shutter speed to 1/ISO. For example:

ISO 100 → 1/100s at f/11
ISO 200 → 1/200s at f/11
ISO 400 → 1/400s at f/11

This rule works because the Full Moon reflects approximately 12% of incident sunlight (albedo ~0.12) — roughly the same reflectance as worn asphalt. The Moon is actually quite dark; it only appears brilliant against the blackness of space.

Phase-Adjusted Exposure

The Looney 11 Rule applies to Full Moon. For other phases, adjust as follows:

| Phase | Exposure Adjustment | Explanation | |-------|-------------------|-------------| | Thin Crescent (<15%) | +2 to +3 stops | Crescent is a tiny sliver of illuminated surface; you need much more exposure | | Waxing/Waning Crescent (15-40%) | +1 to +2 stops | More illuminated area, less exposure needed | | Quarter Phases (50%) | +0.5 to +1 stop | Half disk illuminated, brightness is ~50% of Full Moon | | Gibbous (55-95%) | 0 to +0.5 stop | Nearly full, only slight adjustment | | Full Moon (100%) | Baseline (Looney 11) | Maximum brightness |

Recommended Settings by Phase

| Phase | ISO | Aperture | Shutter | Notes | |-------|-----|----------|---------|-------| | Crescent | 400 | f/8 | 1/200s | Higher ISO compensates for dim crescent; bracket ±1 EV | | Quarter | 200 | f/8 | 1/250s | Good balance of shutter speed and depth of field | | Gibbous | 100 | f/8 | 1/200s | Lower ISO for maximum dynamic range | | Full Moon | 100 | f/11 | 1/100-1/200s | Looney 11 baseline; adjust for atmospheric haze | | Lunar Eclipse | 800-3200 | f/5.6 | 1s-4s | Totality is extremely dim — Earth's umbra is much darker than you expect |

Critical Settings

Always shoot RAW. The Moon's dynamic range — the difference between bright crater walls in sunlight and the blackness of space — exceeds what JPEG can handle. RAW gives you 2-3 stops of highlight recovery.
Manual focus. Autofocus will hunt on a featureless lunar disk at infinity. Use live view at 10x magnification, select a prominent crater near the terminator, and manually focus until crater edges are razor-sharp.
Use a remote shutter or 2-second timer delay. At long focal lengths, even mirror slap (on DSLRs) or the act of pressing the shutter button can introduce visible vibration. Mirrorless cameras in electronic shutter mode eliminate this.
Stack multiple frames for noise reduction. The Moon is bright enough to shoot at ISO 100, but at extreme focal lengths, atmospheric turbulence ("seeing") distorts detail. Shoot 20-50 rapid frames and combine them using stacking software (AutoStakkert!, RegiStax, or Photoshop median layers) to average out atmospheric distortion.

Focal Length and Sensor Size

The Moon subtends about 0.5° in the sky. To fill a sensor frame:

| Sensor Size | Focal Length for Full-Moon Disk | Typical Equipment | |-------------|-------------------------------|-------------------| | Full-frame (36×24mm) | ~2,700mm | 8" SCT telescope + 2x Barlow | | APS-C (1.5x crop) | ~1,800mm | 6" SCT telescope or 600mm lens + 2x TC | | Micro 4/3 (2x crop) | ~1,350mm | 5" telescope or 400mm lens + 2x TC at prime focus |

At more modest focal lengths:

200mm: Moon is ~1/6 frame height — good for landscape compositions with lunar context
400mm: Moon is ~1/3 frame height — good for crater detail with a full-frame sensor
600-800mm: Moon fills roughly half the frame — excellent for single-frame crater detail with a teleconverter

Cropping from a high-resolution sensor (45+ megapixels) at 400-600mm can produce excellent lunar detail without the weight and cost of a telescope.

Shooting Calendar: Planning Months in Advance

The Moon's 29.53-Day Rhythm

The Moon cycles through all 8 phases in 29.53 days (a synodic month). This means:

First Quarter occurs approximately 7.4 days after New Moon
Full Moon approximately 14.8 days after New Moon
Last Quarter approximately 22.1 days after New Moon

Moonrise Timing

The Moon rises approximately 50 minutes later each day. This daily drift is why some moonrises occur during daylight and others at midnight. For photographers, the critical window is when moonrise coincides with sunset or twilight — the "golden hour" of lunar photography.

| Phase | Typical Moonrise Time | Photographic Opportunity | |-------|---------------------|------------------------| | New Moon | Rises with the Sun | Not visible — ideal for Milky Way photography | | Waxing Crescent | Early morning to afternoon | Sets after sunset; visible in evening twilight | | First Quarter | Local noon | Visible all afternoon; sets around midnight | | Waxing Gibbous | Afternoon | Excellent evening moonrise compositions | | Full Moon | Sunset | Prime moonrise shot — Moon rises exactly as Sun sets | | Waning Gibbous | Late evening | Moonrise after dark — good for night landscapes | | Last Quarter | Midnight | Pre-dawn moonset shots | | Waning Crescent | Pre-dawn | Thin crescent before sunrise — Earthshine visible |

Using MoonSync for Planning

MoonSync on fastool.io displays the complete lunar calendar for any date and location. Use it to:

Find the next First Quarter or Last Quarter. Navigate to the lunar calendar, identify when these phases occur, and plan your session. These are your primary lunar surface detail sessions.
Check moonrise and moonset times at your location. The Moon's rise time varies dramatically by latitude and season. MoonSync calculates exact times for your coordinates.
Determine illumination percentage. For landscape astrophotography with moonlit foregrounds, aim for 20-40% illumination (waxing or waning crescent). The Moon lights the landscape without washing out the Milky Way.
Plan moonrise compositions using azimuth. The Moon's rise azimuth shifts seasonally — further north in summer, further south in winter. Use the azimuth data to pre-visualize where the Moon will rise relative to foreground landmarks.

Special Techniques

Earthshine: The Da Vinci Glow

During a thin crescent Moon (2-5 days from New Moon), the dark portion of the lunar disk is faintly illuminated by sunlight reflecting off Earth — Earthshine. Leonardo da Vinci was the first to correctly explain this phenomenon around 1510: sunlight reflects off Earth's oceans and clouds, illuminates the lunar night side, and reflects back to Earth.

To photograph Earthshine, expose for the bright crescent (Looney 11) and take a second exposure 4-6 stops brighter for the Earthshine portion. Blend the two in post-processing. The result shows the complete lunar disk with a thin bright crescent — the classic "old Moon in the new Moon's arms" image.

Lunar Eclipse Photography

During a total lunar eclipse, the Full Moon passes through Earth's umbra (the darkest part of its shadow). The Moon turns deep red — the same scattering effect that makes sunsets red. Totality can last up to 106 minutes.

Settings during totality:

ISO 800-3200 (the eclipsed Moon is surprisingly dim — 10,000-100,000x dimmer than Full Moon)
f/5.6 or wider
Shutter 1-4 seconds
Tracking mount recommended (at 4-second exposures, the Moon will blur from Earth's rotation)

Supermoon Photography

A supermoon occurs when Full Moon coincides with perigee (the Moon's closest approach to Earth, approximately 363,300 km vs. the average 384,400 km). The Moon appears approximately 7% larger and 16% brighter than average — a difference detectable in side-by-side comparisons but subtle in isolation.

For supermoon photography, the key is composition: a supermoon rising behind a recognizable landmark creates a dramatic "giant moon" perception, especially when the Moon Illusion (the perceptual magnification of a low horizon moon) compounds the effect.

References

Rükl, Antonín. Atlas of the Moon. Sky Publishing, 2004. The definitive printed lunar atlas with detailed terminator maps for every libration.
USNO Astronomical Applications Department. "Phases of the Moon." aa.usno.navy.mil/data/MoonPhases. Official U.S. Naval Observatory moon phase data.
NASA Scientific Visualization Studio. "Moon Phase and Libration." svs.gsfc.nasa.gov. High-resolution lunar visualizations with libration data.
Westfall, John E., and William Sheehan. Celestial Shadows: Eclipses, Transits, and Occultations. Springer, 2015. Definitive reference on predicting and photographing lunar and solar eclipses.
Reeves, Robert. Introduction to Astronomical Image Processing. Willmann-Bell, 2017. Comprehensive guide to stacking, sharpening, and processing lunar and planetary images.
Espenak, Fred, and Jean Meeus. Five Millennium Canon of Lunar Eclipses: -1999 to +3000. NASA Technical Publication TP-2009-214172. eclipse.gsfc.nasa.gov. The definitive lunar eclipse catalog.

Plan your lunar photography sessions weeks in advance with MoonSync on fastool.io — free, browser-based, and 100% client-side. No data leaves your device.