Solar Spectrum H-alpha Filters

Description 46mm clear aperture, selected quality with uniform K-Line image Half-bandwidths: 1+.5/-.2 Ang, 0.5+0.1/-0.1A  Extremely Narrow! Used ...

Description 32mm clear aperture, selected quality with uniform K-Line image Half-bandwidths: 1+.5/-.2 Ang, 0.5+0.1/-0.1A  Extremely Narrow! Used ...

Description 18mm clear aperture, selected quality with uniform K-Line image Half-bandwidths: 1+.5/-.2 Ang, 0.5+0.1/-0.1A  Extremely Narrow! Used ...

Get ready for the 2024 Solar Eclipse! Description Triband-SCT's are available in apertures of 8", 91„4" and 11". Triband-ERF-coated Schmidt corre...

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

Description 25mm Clear Aperture Now with Hard-Coated Blocking Filter HW of 0.65Ang +/- 0.1Ang gives best performance for both Disk and Prominences...

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

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

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