DayStar Gemini Quark H-alpha Filter

The Gemini Quark combines prominence and chromosphere views in one filter. Slide between its two independently tuned etalons to compare solar features without exchanging filters.

For refractor telescopes

This model incorporates a 4.2× telecentric Barlow and is designed for best performance with f/4–f/8 refractors. It is not the Combo Gemini. Effective bandpass depends on the telescope configuration.

• Combined 1.25″ and 2″ front fitting
• Standard 1.25″ eyepiece holder
• 22mm clear filter aperture and integrated 12mm blocking filter
• USB power requirement: 5V, 2A
• Two tuning controls and operating-status indicators
• Supplied with international mains adapter and protective hard case

Check your solar configuration

Follow DayStar’s instructions for the exact telescope and filter combination, including any required energy rejection filtering. Confirm compatibility before use. Never view the Sun through an unfiltered telescope.

Manufacturer’s Gemini specifications · Compatible DayStar accessories