Heliostar 100 H-Alpha telescope

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)