Unistellar Smart Solar Filter

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Product Overview

The Smart Solar Filter allows observers to safely view the Sun in just 2 minutes with their Unistellar telescopes.

This all-in-one package includes a solar filter designed to fit Unistellar telescopes with a polymer sheet selected to reduce 100,000 times the Sun's light, and a solar mode in the Unistellar App to elevate the observing experience to new heights.


The sun

Unlock the secrets of Solar Activity

Experience the beauty of the Sun’s ever-changing activity and observe its striking sunspots and faculae – temporary phenomena on the Sun’s photosphere, created by intense magnetic field flux. With the Unistellar Smart Solar Filter and Solar mode in the Unistellar App, you can easily track the Sun and monitor the fluctuating Sunspot number, which ranges in size from 16 km to 160,000 km and can last from a few days to several months. Get ready to discover the stunning features of the Sun with the Unistellar Smart Solar Filter.

Unistellar App

Seamless All-in-One Solar experience

Observing the Sun has never been easier, faster or safer. Our cutting-edge Solar Experience feature includes a smart GoTo Sun capability within the Unistellar App, enabling you to effortlessly observe the Sun. All you need to do is connect your telescope during the daytime, attach the Smart Solar Filter, and with the Unistellar App, GoTo the Sun automatically.

  • A new solar experience available on Unistellar App (iOS & Android)
  • Smart Go-To Sun function Observe the Sun in less than 2 Minutes
  • Safely Experience With Your Family
  • Witness once-in-a-lifetime solar events
  • Snap & Share pictures
Annular eclipse courtesy Stefan Seip / NASA / Public Domain

Unlock the secrets of the Sun

Safely witness incredible celestial events with the Unistellar Smart Solar Filter.

On October 14, 2023, capture the “Ring of Fire” during an annular eclipse, and on April 8, 2024, experience a total solar eclipse and catch a glimpse of the Sun’s mesmerizing corona and the stunning “diamond ring” effect.

These once-in-a-lifetime opportunities can be exclusively viewed with the Unistellar Smart Solar Filter from America with other events scheduled in Europe in 2026.

More info here for 2023 US, here for 2024 US, and here for Europe 2026.

Unistellar smart solar filter

The safest way to observe the Sun

Experience the next solar eclipse with your loved ones and enjoy the ultimate peace of mind with the Unistellar Smart Solar Filter. Designed to fit perfectly onto your telescope, guaranteeing it remains secure during use. Crafted from a premium polymer sheet, the Smart Solar Filter is built to withstand the test of time, reducing 100,000 times the intensity of the Sun’s light for optimal viewing while also safeguarding your telescope.

Whether you’re observing through the eyepiece or via your smartphone, rest assured that the Smart Solar Filter is 100% safe and poses no threat to your eyes. With the Unistellar Smart Solar Filter.



Self Sun Pointing Yes, in App
Tracking Technology Yes, in App
Filter Category White light solar filter
Light Reduction -100.000 x Sun's light
Neutral Density 5
Material Polymer sheet
Mount Dimension 143 mm
Sheet Dimension 116 mm

Solar Eclipses Oct 14, 2023 and April 8, 2024


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