Astronomik H-Beta Filter 1,25'' The Astronomik H-Beta filter is made for the visual observing with 8" telescopes and larger. Only light of the very small H-Beta spectrum in which the hydrogen nebulas shines can pass. The contrast of this objects increases, so objects normally only visible on photos will be viewable for the naked eye.
Which objects can be observed: This filter enables a very contrasty observing of hydrogen nebulas.
Which telescopes can be used with this filter: We recommend the H-Beta filter for telescopes from 20 cm aperture onwards.
Delivery contains: Products specifications
| Connectingthread | M 28.5 mm both sides |
| Diameter | 1 1/4" |
| Accessory | Filterbox |
| IR blocking | up to ca. 1150 nm |
| Thickness | Parfocal with the other Line Filters |
| Made for | False Color Photography with CCD Cameras |
| Type of filter | H-Beta Filter |
| Transmission | 97 % at H-Beta Wavelength |
