Quark Gemini Switchable
DayStar
From ~$1,656.63
2 stores
The DayStar Quark Gemini Switchable is a dual-bandpass hydrogen-alpha solar filter that combines both prominence and chromosphere viewing modes in a single, compact eyepiece-format device. Using a mechanical push-pull slider system, observers can instantly switch between the two Fabry-Perot etalon elements without equipment swapping or refocusing, enabling rapid comparison imaging and optimal surface detail or limb observations. Built with a 4.2x telecentric barlow lens specifically optimized for the 656nm H-alpha wavelength, this all-in-one filter delivers superior field flatness and is ideal for both visual observation and astrophotography on refractor telescopes and compatible with SCT/Maksutov designs using optional accessories.
Specifications
| Barlow Magnification | 4.2 |
| Clear Eyepiece Aperture | 22 mm |
| Recommended Focal Ratio | F/4 to F/8 |
| Current Draw | 2 |
| Wavelength | 656 |
| Wider Etalon Bandpass | 0.6 |
| Input Connector Sizes | 1.25 in |
| Number of Etalon Elements | 2 |
| Power Consumption | 10 W |
| Switching Method | Push-pull slider |
| Tuning Range | 0.5 |
| Narrower Etalon Bandpass | 0.5 |
| Off-band Blocking Range | X-ray to 2 microns |
| Power Supply | 5 V |