The solar eclipse on 16 August 2026 will be a major sky event for many people. If you do not have certified eclipse glasses, there are reliable do‑it‑yourself ways to observe the phenomenon without risking retinal injury, but caution is essential.
Why you must not look directly at the Sun
Even when the Moon covers most of the Sun, the remaining visible crescent emits intense light and invisible infrared and ultraviolet radiation that can burn the retina. The damage can be painless and permanent. The simplest rule is: do not look directly at the Sun unless you have certified solar viewers or your eye is protected by an appropriate filter.
Safe alternatives: projection techniques
When proper eclipse glasses are unavailable, experts recommend indirect viewing methods that project an image of the Sun onto a surface. These techniques use ordinary items to create a safe, magnified view without putting the eye at risk.
- Pinhole projector: Make a small hole in stiff card, hold it so sunlight passes through the hole and projects an image of the Sun onto a white surface.
- Natural pinhole projection: Gaps between leaves on trees act like many tiny pinhole projectors; the ground under foliage often shows multiple crescent images during partial eclipses.
- Household perforated objects: A colander or grater can project several images of the Sun onto a nearby surface, creating a pleasing multiple‑image effect.
"The lens acts like a magnifier – and if you aim an unfiltered phone at the eclipse, its ..."
The point about cameras and phones is important. Consumer cameras and phone lenses concentrate light, increasing the risk to your sensor and your eye if you look through a viewfinder or hold a phone to your eye. Unless your camera or phone has a certified solar filter fitted over the lens, it should not be pointed directly at the Sun.
What to avoid
- Do not look directly at the Sun without certified solar viewers.
- Do not substitute sunglasses, smoked glass, exposed film, CDs or ordinary camera filters for eclipse glasses; they do not block the full spectrum of harmful radiation.
- Do not point an unfiltered phone or camera lens at the Sun — the optics concentrate light and can damage the sensor or, if viewed through an eyepiece, your eye.
Practical tips for group viewing and children
Projection methods are particularly useful for groups and for children because they allow many people to watch the same projected image at once. A simple setup with a pinhole projector or a colander and a white card gives a sufficiently large image for a class or family to follow the eclipse together while keeping every eye protected.
| Method | Advantages |
|---|---|
| Pinhole projector | Simple, reliable, safe for all ages |
| Tree‑leaf projection | No equipment needed, natural and accessible |
| Colander or perforated object | Produces multiple images, good for groups |
If you can obtain properly certified eclipse glasses or a solar viewer that meets the international safety standard (ISO 12312‑2), they are the simplest option for direct viewing. Otherwise, use projection methods and never risk a direct glance.
Finally, remember that photographs taken with unfiltered equipment can also suffer permanent damage to sensors. If you intend to photograph the eclipse, check equipment specifications and use a certified solar filter designed for the camera in use.
Observing a solar eclipse can be an exciting and memorable educational moment. With the right precautions — certified viewers or indirect projection — you can enjoy the event safely and share it with family, classmates or a community group.
