Solar Spectrum H-alpha Filters

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 disc up to effective focal lengths o...

Description 2" inner thread: 50.8 mm - not M48! Hole diameter: 3,3mm Screw Head Recess diameter: 5,1mm Recess depth: 5,5mm (complete optical heigh...