Description
- About this item
- H-Beta Filter is designed for deep sky observation; particularly useful for observing the Horsehead nebula Cocoon nebula High value transmission of pass-band and optical density of off-band is assured through planetary rotation system a homogenous and precise coating procedure The ion auxiliary deposition (IAD) technique improves the density of the film and ensures that the temperature drift of the filter wavelength is minimized Each H-Beta filter is individually inspected and each filter comes with a plastic case with high pressure EVA case lining
Svbony SV132 Telescope Filter 2inches, Astronomy H-Beta Filter, 25nm Narrowband Filter for Astrophotography, Horsehead Nebula Cocoon Nebulae
