ctHeI — Filter He I July 7, 2021 Comments ISPI Narrow Band Filters. Wavelengths @80% (micron): 2,0545 - 2,0674 About the Filter Id: ctHeI Number: Release date: July 7, 2021, 12:00 pm Telescope: Víctor M. Blanco 4-meter Telescope Instrument: ISPI Filter Details CWL (Å): 20618.00 FWHM (Å): TMAX (%): Filter Documents
ISPI Narrow Band Filters. Wavelengths @80% (micron): 2,0545 - 2,0674