Best Solar Eclipse Glasses for August 12, 2026: The Complete Safety Guide
The 2026 total solar eclipse crosses Spain and Iceland on August 12 — the first over mainland Europe since 1999. Here's every safe viewing option and what to avoid.
On August 12, 2026, a total solar eclipse will cross the Iberian Peninsula, Iceland, and Greenland. For much of northern Spain, this is the first total eclipse visible from home since 1999 — a 27-year wait. For Iceland, it is the only total solar eclipse of the entire 21st century.
If you are reading this in May or June 2026, you have time to source good equipment and receive it before the event. If you are reading this in late July, buy immediately: certified eclipse glasses routinely sell out weeks before major eclipses and the counterfeit market spikes sharply as the date approaches.
This guide covers every safe solar viewing option — from basic ISO-certified glasses to telescope filters — and explains exactly what the safety standard means, not just that one exists.
The Path of Totality: Are You In?
The totality path enters Europe from the Atlantic, crosses northern Spain, clips a thin strip of northern Portugal, and continues northeast. If you are outside the path, you will see a partial eclipse — still spectacular, but it requires eye protection throughout. Inside the path, glasses come off only during the brief window of total coverage.
Spanish cities in the path of totality (approximate durations):
| City | Duration of totality |
|---|---|
| A Coruña | ~1 min 16 sec |
| Gijón | ~1 min 45 sec |
| Valladolid | ~1 min 28 sec |
| Logroño | ~1 min 21 sec |
| Castellón de la Plana | ~1 min 34 sec |
| Palma, Mallorca | ~1 min 36 sec |
Madrid and Barcelona fall just outside the totality path — both will see a deep partial eclipse (over 90% coverage) but not totality. The difference is not cosmetic: totality is a categorically different experience, and it is worth traveling to the path if your location is close to the edge.
Iceland: Reykjavik sits near the southern edge of the path, with approximately one minute of totality. It is the only total solar eclipse Iceland will experience this century — the next is in 2196.
The Only Safety Standard That Matters: ISO 12312-2
Every pair of solar eclipse glasses you consider must be certified to ISO 12312-2:2015(E). This is not a marketing claim — it is an internationally standardized test that specifies the maximum amount of solar radiation a filter can transmit to the eye.
The number you need to understand: 0.0032% transmission. That is the maximum luminous transmittance allowed under ISO 12312-2 for direct solar viewing. Regular sunglasses, even the darkest ones, transmit roughly 20,000 times more light than this standard permits. Viewing the sun through sunglasses causes permanent retinal damage with no pain signal — the retina has no pain receptors.
What to check on the packaging:
- The text “ISO 12312-2:2015” printed on the frame (not just on the box)
- CE marking (required for European market compliance)
- Manufacturer name and address
- No pinholes, tears, or delamination when held up to a bright indoor light
What to ignore: “CE certified” without the ISO number means nothing for solar safety. The CE mark alone covers a broad range of optical products and does not guarantee solar-safe transmission levels.
The Counterfeit Problem
In the weeks before a major eclipse, counterfeit glasses flood online marketplaces. They are physically identical to certified products and often carry fake ISO logos and CE marks. The American Astronomical Society (AAS) maintains a curated list of manufacturers whose products have been independently tested. Buying from brands on that list — or from established astronomy retailers rather than generic marketplace listings — is the safest approach.
If your glasses arrived from a marketplace seller you cannot verify: check them. Hold them up to a bright indoor bulb. If you can see anything through them except the bulb itself, they do not meet the standard.
Best Solar Eclipse Glasses in 2026
Celestron EclipSmart Solar Viewing Glasses
Celestron is one of the few mainstream telescope brands that has been selling ISO-certified solar viewers long enough to have a track record across multiple eclipse events. The EclipSmart line uses a silver-black polymer filter material that meets ISO 12312-2 and CE standards, and Celestron is on the AAS approved manufacturer list.
The glasses themselves are lightweight, with a printed cardboard frame that fits comfortably over most prescription glasses. The filter material is rigid enough to resist accidental damage during transport.
What you will see: The Sun rendered as a sharp, orange-gold disc. Any sunspots visible on the day will be clear at this magnification (1x). If you want more detail, pair these with the Celestron EclipSmart 2x power viewer — same filter standard, with a modest magnification that resolves larger sunspot groups more clearly.
Verdict: The safe default choice. Available from astronomy retailers and Amazon EU. Buy from a seller you can verify, not the cheapest marketplace listing.
Price range: €15–€25 for a pack of two.
Rainbow Symphony ISO Eclipse Glasses
Rainbow Symphony has manufactured eclipse glasses since the 1990s and has sold certified products for every major US and European eclipse in that period. Their standard frame uses a black polymer solar filter with the same ISO 12312-2 transmission specifications.
What distinguishes Rainbow Symphony is availability: they sell in individual pairs and in bulk packs of 25, 50, and 100 units. If you are organizing a group viewing event — school, astronomy club, workplace rooftop — this is where to start. The price per unit drops significantly at volume.
The image quality through Rainbow Symphony filters produces a slightly warmer, more orange tint than the neutral grey of some competitors. This is an aesthetic difference, not a safety one.
Verdict: Best option for groups. Reliable manufacturer with a verifiable track record.
Price range: €1.50–€3 per unit in bulk packs; €10–€15 for individual packs of two.
Baader Planetarium AstroSolar Safety Film
Baader’s AstroSolar is not a pair of glasses — it is a roll of optical-density filter film that you cut and frame yourself. This is the choice for observers who want the highest optical quality available in a solar filter, or who want to make custom filters for binoculars, camera lenses, or telescope objectives.
The film comes in two optical densities: OD 5.0 (Silver) for visual observation, and OD 3.8 (Gold) for photography. Visual observing requires OD 5.0. The Silver film transmits a neutral grey-white image of the sun — many experienced observers consider it the sharpest, most accurate solar viewing experience available at any price.
Making a filter from the film requires cutting it slightly oversized and mounting it in a cardboard or 3D-printed cell that fits over your instrument’s aperture. It is not complicated, but it is not plug-and-play either.
For eclipse glasses specifically: Baader also produces pre-made glasses using the AstroSolar film in a printed paper frame. These are the premium paper-frame option if you want the film’s optical quality without DIY work.
Verdict: The best choice for telescope and binocular solar filters, and for anyone who wants the highest image quality. The DIY aspect is straightforward for anyone comfortable with basic optics work.
Price range: €25–€35 for an A4 sheet (enough for multiple filters); €8–€15 for pre-made AstroSolar paper glasses.
Thousand Oaks Optical Solar Viewers
Thousand Oaks Optical has been producing solar filters since the 1970s. Their Black Polymer solar glasses use the same filter technology as their telescope filters — a carbon black polymer with ISO 12312-2 certification and a long safety record across multiple eclipse cycles.
The Thousand Oaks glasses produce a slightly orange solar image. The build quality is solid — slightly more durable than standard paper-frame options, with a frame that resists bending during extended use.
Verdict: Dependable, with one of the longest track records in the category. A good backup option if Celestron or Baader are sold out.
Price range: €12–€20 depending on pack size.
Lunt Solar Systems Eclipse Glasses
Lunt is primarily known for their hydrogen-alpha solar telescopes — high-end instruments for serious solar observers. Their eclipse glasses apply the same manufacturer credibility to a mass-market format, with ISO 12312-2 and CE certification.
Lunt explicitly markets their eclipse glasses for the 2026 European eclipse, which means supply should be more readily available in EU channels than some US-focused competitors.
Verdict: Good option for buyers who want to purchase directly from a dedicated solar astronomy brand rather than a general optics company.
Price range: €15–€25 for a pack of five.
Solar Filters for Binoculars and Telescopes
If you own binoculars or a telescope and want to observe the partial phases with magnification, you need a purpose-built solar filter for your instrument. Never use eclipse glasses as a filter in front of binoculars or a telescope eyepiece — the concentrated light from the objective will burn through them instantly.
Solar filters for instruments fit over the front aperture (the large end), not the eyepiece. This reduces the incoming light before it enters the optical train.
Ready-made options:
- Celestron EclipSmart Solar Filter — available for most Celestron telescope aperture sizes
- Baader AstroSolar film — cut to size and mount in a cell for any instrument
- Thousand Oaks Optical glass filters — premium glass substrates for telescopes; the best image quality for solar observation
The view of a sunspot group through even a 70mm refractor with a proper solar filter is genuinely striking — fine structure within the spot’s umbra and penumbra becomes visible. It is worth the additional equipment if you have a telescope already.
The Critical Moment: When to Remove Your Glasses
During totality — and only during totality — it is safe to observe the sun with the naked eye. Totality begins the instant the Moon’s disc completely covers the solar photosphere. The signal is unambiguous: the sky darkens suddenly, the solar corona becomes visible (the white atmospheric halo normally overwhelmed by the sun’s direct light), and the brightest stars may appear.
Baily’s Beads are the visual cue that totality is seconds away: as the Moon’s limb moves across the solar disc, mountains and valleys on the lunar surface create momentary gaps in coverage, producing a string of bright points along the edge. When the last bead disappears and the corona becomes fully visible, glasses come off.
Glasses go back on the instant any part of the solar photosphere reappears on the opposite limb — this happens suddenly and without warning. When in doubt, glasses stay on.
The eclipse happens once per generation at any given location. Retinal burns from premature removal are permanent and irreversible. The window of totality is typically 1–2 minutes. Use it fully, but use it carefully.
What to Avoid
Any glasses without ISO 12312-2 on the frame itself — the box alone is not sufficient. Counterfeit products routinely print correct-looking text on packaging.
Welding glass below shade 14 — the recommended shade 14 welding glass transmits excessive infrared radiation even when visible light appears blocked.
Smoked glass, CDs, X-ray film, stacked sunglasses — none of these meet the transmission requirements of ISO 12312-2. They feel dark enough to look at the sun without pain, which is exactly what makes them dangerous — the retina does not signal damage until it has already occurred.
Glasses purchased from non-verified marketplace sellers in the final weeks before the eclipse — buy now, from a named manufacturer or a dedicated astronomy retailer, with time to receive and check your order.
When and Where to Buy
Buy now. Supply chains for eclipse glasses are not built for demand spikes. In the months before the 2024 North American total eclipse, certified glasses from reputable manufacturers sold out across Amazon US and most specialty retailers by late March — a month before the April 8th event.
The 2026 eclipse has two high-demand regions (Spain and Iceland) and a large general European audience for whom it will be the first accessible total eclipse in nearly three decades. Expect similar supply constraints.
Where to buy in Europe:
- Celestron EclipSmart — Amazon.es, Amazon.de, Amazon.fr; also Celestron.com with EU shipping
- Baader AstroSolar — First Light Optics (UK), Astroshop.eu, Baader-Planetarium.com
- Rainbow Symphony — rainbowsymphony.com ships internationally; also available via Amazon EU marketplace (verify seller)
- Lunt Solar Systems — luntsolarsystems.com; stocks EU-targeted inventory for 2026
- Thousand Oaks — available via Amazon EU and specialist astronomy retailers
Order with enough time for international shipping and to check your glasses on arrival. A pair with a pinhole, a delaminated film section, or a damaged frame should be replaced — the standard assumes intact filter material.
Some links on this page are affiliate links. If you purchase through them, Orion News earns a small commission at no extra cost to you. This does not affect which products are recommended or how they are reviewed.