Omegon Helievo 172 solar filter (164–188 mm)

Omegon Solar Filter Helievo 172 mm

The Omegon Solar Filter Helievo 172 mm in an anodized aluminium cell is designed for safe and easy visual observation of the Sun in white light using a telescope. Featuring time-tested AstroSolar filter foil with a 100,000X filter factor, it blocks 99.999% of sunlight to deliver high-contrast solar views while maintaining complete eye safety.

Key advantages

• Direct attachment: Pre-assembled filter built into a durable anodized aluminium mount.
• High-quality AstroSolar foil: Provides a 100,000X filter factor (only 0.001% sunlight transmission).
• Scratch-free mounting: Secured via 3 aluminium screws with protective plastic tips.
• Wide compatibility: Fits telescope tubes or dew shields with outer diameters from 164 to 188 mm (maximum internal cell diameter is 190 mm).
• Unscrewable filter cell: Allows convenient replacement of damaged foil if needed.
• Durable construction: Made from lightweight aluminium with a silver finish.

Product description

The Sun is our central star, and observing its active surface provides a fascinating experience for astronomy enthusiasts. With Omegon Helievo solar filters, solar observation is straightforward and entirely safe. The filter arrives pre-assembled, allowing you to attach it to your telescope objective instantly without complex setup.

Reliable foil protection: Equipped with long-proven AstroSolar aperture filter foil, this filter prioritizes safety above all. With an attenuation factor of 100,000, only 0.001% of sunlight passes into the optical system, ensuring secure visual observation at all times.

Applications and recommended use: This filter is ideal for observing sunspots, solar flares, and surface granulation structures. It is also an essential tool for viewing solar eclipses as the Moon gradually covers the Sun's disk.

Safety guidelines for solar eclipses:

• Partial solar eclipse: While the Moon has not completely covered the Sun, the solar filter or protective cap must remain fitted on your telescope or binoculars.
• Total solar eclipse: Only when the last sunlight disappears behind the Moon's edge ("diamond ring" effect), the filter may be temporarily removed. Totality lasts only a few minutes. Remain vigilant: as soon as the "diamond ring" reappears, immediately place the filter back on the telescope!
• The same safety rules apply to eclipse glasses. For partial eclipses, protection must remain in place during the entire observation.

SkyHunters provides expert consultations and support to help you select the right optical accessories for safe astronomical observations.

Technical specifications

Package contents

• Omegon Solar Filter Helievo 172 mm in aluminium cell
• 3 aluminium mounting screws with plastic tips