Explore Scientific Sun Catcher Variable Large Aperture Solar Filter — Adjustable White-Light Filter for Any Telescope

The Explore Scientific Sun Catcher variable large-aperture solar filter lets you safely observe the Sun in white light through almost any telescope. A proper solar filter fits over the FRONT of your telescope and blocks the overwhelming majority of the Sun's light and heat, so you can view sunspots, granulation, and solar transits safely. Its adjustable aperture design fits a wide range of tube diameters, and this listing offers sizes for many common telescopes.

White-light solar viewing is the safest, simplest way to watch the Sun — revealing dark sunspots and the mottled texture of the solar surface in natural color.

Who it's for

For observers who want to safely view the Sun in white light through their existing telescope. New to filters? See our guide to the best telescope filters for beginners.

Key features

• Safe white-light solar viewing of sunspots and surface granulation.
• Front-mounted design that blocks the Sun's light and heat before it enters the scope.
• Variable / adjustable aperture to fit many telescope tube diameters.
• Multiple sizes available for small refractors up to large SCTs.
• Natural white-light image showing sunspots in true color.

Frequently asked questions

Is it safe to look at the Sun with this?
Yes — when properly fitted over the FRONT of your telescope. Always ensure it's secure before viewing. Never look at the Sun through a telescope without a proper front solar filter.

Which size do I need?
Choose the variant that matches your telescope's outer tube diameter. The variable design accommodates a range within each size.

What will I see?
Dark sunspots and the subtle granular texture of the Sun's surface in natural white light.