Solar Eclipse Photography: Smartphone Settings Guide

Capturing a solar eclipse is one of the most rewarding challenges for any photographer. While professional astronomers use expensive telescopes and trackers, the smartphone in your pocket is surprisingly capable of documenting this celestial event. However, pointing your lens directly at the sun requires specific preparation to protect your device and achieve clear results. This guide breaks down the exact manual settings, apps, and equipment you need for iPhone and Android devices.

The Non-Negotiable Safety Rule: Solar Filters

Before opening your camera app, you must address equipment safety. Just as looking at the sun can damage your retinas, the intense rays of the sun can burn your smartphone’s image sensor. This can cause permanent spots on your photos or total sensor failure.

You need a solar filter that meets the ISO 12312-2 international safety standard. You cannot use standard sunglasses, neutral density filters, or polarizing filters.

  • Dedicated Smartphone Filters: Brands like VisiSolar and Solar Snap make filters specifically designed to tape over or clip onto smartphone lenses.
  • DIY Solution: If you have a spare pair of ISO-certified paper eclipse glasses (like those from American Paper Optics), you can cut out one of the lenses and tape it securely over your phone’s camera array. Ensure there are no light leaks around the edges.

Crucial Note: You must keep the filter on during the partial phases. You only remove the filter during the brief moments of “totality” when the moon completely blocks the sun.

Essential Gear for Sharp Images

Holding your phone by hand will result in blurry, disappointing images. The sun moves across the sky faster than you realize, and at high zoom levels, even a heartbeat causes camera shake.

  1. Tripod: A stable base is mandatory. A Joby GorillaPod is excellent for flexibility, or a lightweight Manfrotto travel tripod provides rigid stability.
  2. Smartphone Mount: Ensure your mount clamps the phone tightly. The Vbestlife or Ulanzi metal mounts are superior to cheap plastic spring-loaded clips.
  3. Telephoto Lens Attachment: Most smartphones have wide-angle lenses that make the sun look like a tiny dot. Attaching an external lens, such as the Moment 58mm Tele Lens or products from Sandmarc, provides optical zoom without the quality loss of digital zooming.

iPhone Photography: Mastering Manual Control

The native iOS camera app is designed for snapshots, not astrophotography. To get good results, you must take control of the exposure.

Using the Native App

If you stick to the default camera, you must use AE/AF Lock:

  1. Frame the sun (with filter on).
  2. Tap and hold the sun on your screen until the yellow “AE/AF LOCK” banner appears.
  3. Drag the sun icon next to the focus box all the way down to lower the exposure.
  4. Shoot in ProRAW if your model supports it (iPhone 12 Pro and later). This gives you more data to recover details in shadowing during editing.

For true manual control, download Halide Mark II or Yamera. These allow you to adjust specific parameters that the native app hides.

  • ISO: Set this to the lowest possible value (usually ISO 32 or 50) to minimize grain.
  • Shutter Speed: This is your main variable. During partial phases, the sun is bright. Start around 1/1000s and adjust faster or slower until the sun is a sharp orange disk, not a blooming white blob.
  • Focus: Disable autofocus. Set the focus manually to 1.0 (Infinity).

Android Photography: Utilizing Pro Mode

Most mid-range to flagship Android devices (Samsung Galaxy S series, Google Pixel 8 Pro, Xiaomi 14) include a robust “Pro” or “Manual” mode built directly into the stock camera app.

Accessing Pro Settings

Open your camera and swipe through the modes until you find “Pro” or “Expert RAW.”

  1. ISO: Lock this at 50 or 100. Do not use Auto ISO.
  2. Focus: Switch from AF (Auto Focus) to MF (Manual Focus). Slide the bar to the “Mountain” icon or infinity symbol. The focus peaking feature (green lines highlighting edges) might not work on the sun, so trust the infinity setting.
  3. Shutter Speed:
    • Partial Phase: 1/500s to 1/4000s. The filter makes the image dark, so you need to balance the speed to see the sun.
    • Totality: 1/10s to 1/100s. When the corona appears (and the filter is off), you need a slower shutter to capture the wispy streams of light.
  4. Format: Enable RAW (DNG) files in the settings menu.

Shooting Strategy by Phase

The eclipse is a dynamic event. Your settings must change as the lighting conditions shift drastically.

Phase 1: The Partial Eclipse

This is the longest phase. The sun looks like a cookie with a bite taken out of it.

  • Filter: ON.
  • Zoom: Use your phone’s optical telephoto lens (3x or 5x). Avoid “Space Zoom” or digital zoom beyond 10x, as the image will become pixelated mush.
  • Exposure: Underexpose significantly. You want the sun to look orange or white against a pitch-black background.

Phase 2: The Diamond Ring and Baily’s Beads

Just before totality, shafts of light push through lunar valleys.

  • Filter: ON (until the very last second).
  • Burst Mode: This lasts only seconds. Hold down the shutter button to take a burst of photos. This increases your odds of catching the “sparkle” effect.

Phase 3: Totality

The main event. The sky turns dark.

  • Filter: OFF (Immediately remove it).
  • Settings Adjustment: The corona is much dimmer than the sun’s surface. Drop your shutter speed significantly (e.g., 1/50s or slower).
  • Focus Check: Ensure your focus hasn’t drifted from infinity.
  • Environment: Take a wide-angle photo of the landscape. The horizon often glows with a 360-degree sunset effect.

Phase 4: Post-Totality

As soon as the bright “Diamond Ring” reappears on the other side:

  • Filter: ON (Immediately replace it).
  • Settings: Return to your fast shutter speeds (1/1000s).

Post-Processing Your Images

Raw photos of an eclipse often look flat or dark initially. Use Adobe Lightroom Mobile or Snapseed to edit them.

  1. Crop: Since you likely shot wide to keep the sun in frame, crop the image to center the eclipse.
  2. Highlights/Shadows: Lower the highlights to sharpen the edge of the sun. If you shot totality, raise the shadows to reveal the structure of the corona.
  3. Dehaze: A slight increase in the “Dehaze” slider can help increase the contrast between the black sky and the glowing sun.
  4. Sharpness: Apply masking to sharpen only the edges of the sun or moon, avoiding the empty black sky which can become noisy.

Frequently Asked Questions

Will taking a picture of the sun break my phone?

Yes, it is possible. The lens acts like a magnifying glass, concentrating heat onto the sensor. Extended exposure without a solar filter can melt internal components or burn pixels on the sensor. Always use an ISO 12312-2 compliant filter for the partial phases.

Can I just use my sunglasses over the lens?

No. Sunglasses transmit thousands of times more light than a solar filter. They block UV light for eyes but do not block enough infrared and visible light to protect a camera sensor or your eyes during solar observation.

Why is my eclipse photo blurry?

The most common culprit is autofocus failure. The camera tries to focus on the black sky and fails to lock onto the bright sun. You must set your focus to “Manual” and slide it to infinity. Using a tripod and a bluetooth shutter remote (or a 3-second timer) also eliminates blur caused by tapping the screen.

When exactly do I take the filter off?

You remove the filter only when the sun is 100% covered by the moon. If even a tiny sliver of sunlight is visible, the filter stays on. As soon as the sun begins to reappear, the filter must go back on immediately.