Coronado Hydrogen Alpha 40mm f/10 Refractor
40mm/400mm Ha Etalon/filter for Solar Observing.
Specifications:
• Aperture: 40mm
• Focal Length: 400mm
• F/Ratio: F/10
• Bandwidth: <1.0Å
• Thermal Stability: 0.005 Å/°C
• Safety Blocking: >10-5 from EUV/IR
Purchased as an alternate way to view the sun to white light observing, (Chromosphere as opposed to the Photosphere) it is mounted on a TeleVue Piggycam bracket.
Bandpass of <1.0 Angstrom but it is also thermally stable and requires no more time to operate than putting in a eyepiece and adjusting the focus and tuning the etalon...
The PST will show you prominences, active regions, filaments, and plages as well as other surface details.
Enhanced coating Cemax eyepieces for sharp Ha viewing and imaging.
Scopestuff PST sunshade greatly enhances viewing comfort and contrast.
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