Solar Spectrum H-alpha Filters

Description 25mm Clear Aperture HW of 0.65Ang +/- 0.1Ang gives best performance for both Disk and Prominences Tiltable Etalon TEC Oven with contro...

Description Solar Observer Filter: Standard-Filter with a clear aperture of 25mm. Shows the full sun disk up to effective focal lengths of approx....

Description Advanced Solar Observer Filter: Standard-Filter with a clear aperture of 32mm. Shows the full sun disk up to effective focal lengths o...

Description Research Grade Filter RG 18: 18mm clear aperture, selected quality with extremely uniform H-alpha image over the entire image field Ha...

Description Research Grade Filter RG 32: 32mm clear aperture, selected quality with extremely uniform H-alpha image over the entire image field Di...

Description Research Grade Filter RG 46: 46mm clear aperture, selected quality with extremely uniform H-alpha image over the entire image field Di...

Description Achromatic 3x telecentric system Four-lens optical design, BBAR (Broad-Band Anti-Reflection) coating Anti-reflective thread and black...

Description Silently heated H-alpha-Filter includes a compact new 3x telecentric system with 2nm hard-coated blocking filter Half-width (FWHM) of...