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Sky-Watcher’s Heliostar H-alpha Solar Telescopes offer a dedicated solar viewing experience to the lineup. Hydrogen-alpha solar observing allows you to unlock the incredible dynamics of the surface of the Sun far beyond what a white light solar filter can deliver.
Double the Fun
Heliostar provides incredible double stack performance for the price of one etalon filter. There is no need for costly double stack systems, Heliostar Ha is tuned to <0.5Å natively providing rich surface detail with its 76 and 100mm apertures, delivering high resolution viewing and imaging.
Hydrogen Alpha Technology
Hydrogen Alpha solar telescopes are specialized instruments used to observe the Sun in a specific wavelength of light—656.3 nm—which corresponds to the emission line in the “A” alpha absorption band of the Balmer series. This wavelength is critical for studying solar phenomena and specific solar activity in the chromosphere, a layer of the Sun’s atmosphere located just above the photosphere
FEATURES
- Double stack performance, single stack price
- 76mm or 100mm aperture
- Official solar telescope of the Charlie Bates Solar Astronomy Project
- Integrated solar finder, tube rings, and carry handle
- Integrated Trifid Tuner and Solis Etalon Technology
- <0.55Å bandpass
- H-alpha fully-multicoated lens
- Achromatic doublet design
- 11:1 dual-speed focuser
- 1.25-inch diagonal format blocking filter
| Optical Specifications | |
|---|---|
| Optical Design (achro or apo) | Achromatic |
| Lens Coating (fully multi-coated)? | H-alpha fully multicoated |
| Lens design (doublet, triplet or Quad) | Doublet |
| Optical Quality | Diffraction limited (1/4 wave) |
| Collimatable Cell | No (Self Aligning Cell) |
| Primary Aperture (mm) | 100mm |
| F/Ratio | 7.6 |
| Focal Length (mm) | 760mm |
| Blocking Filter Size | 20mm |
| Solar Image Size | 7.6mm |
| Bandpass | < 0.55Å |
| Mechanical Specifications | |
| Focuser Type | Crayford |
| Focuser Size | 2" |
| Focuser: Dual or Single Speed | Dual speed |
| Compression Ring | No* (Only on diagonal) |
| OTA material | Aluminum |
| Optical Tube length (inches) | 30" |
| Optical Tube weight (pounds) | 13.2 pounds |
| Mounting Rings? | Mounting Rings |
| Dovetail type | V-style |
| Accessories | |
| Eyepieces | 22mm 70º 1.25" eyepiece |
| Diagonal | 20mm 1.25" H-alpha blocking diagonal |
| Camera Adapter | No |
| Additonal Accessories | Sun shade & 2" adapter |
| Included finder | Heliostar solar finder |
| Manual | Digital PDF |
| Case | Yes |
| Observational Info | |
| Dawes Limit | 1.16 |
| Rayleigh Limit | 1.4 |
| Limiting Magnitude | 12.48 |
| Minimum Magnification | 14x |
| Maximum Magnification | 197x |
| Magnification with included eyepieces | 35x |
| Light Gather (compared to next size down) | 73% compared to Heliostar 76Ha |
| Intended use | Solar (visual & Imaging) |