As many celestial objects, such as nebulae, radiate at other wavelengths, a considerable increase in contrast can be achieved by this. The background sky appears darker and all at once, faint details become visible.
2" filter thread, each Alstar Ultra High Contrast Filter is individually inspected and proudly inscribed with the percentage of light transmittance of the O-III and H-beta emission lines.
Can be used at both light-polluted and dark sky sites. Blocks the light from mercury and sodium-vapour lamps.
Many objects only first become visible at all when using an UHC filter. But also, highlights such as the Orion, Lagoon or Swan nebulae, show a whole new side to them.
Nebula filter for increasing contrast, also suitable for use with smaller telescopes.
Alstar 2" Color/Planetary Filter for Telescope - #80A Blue
KWD 13.500
Alstar 2" Narrowband O-III Filter - Produces Near-Photographic Views of The Veil, Ring, Dumbbell and Orion Nebula, Among Many Other Objects
KWD 35.500
Alstar Guide Scope Mount - The Convenient Way to Mount Your Guide Scope
KWD 62
Alstar 2" Narrowband NBPF Hydrogen-a 12nm Filter - Enhances The Contrast Between Object and Sky - Allows You to Take Images Even Under Urban Skies
KWD 55.500
