Optolong H-alpha 3nm 2" Filter
H-alpha filter passes light at 656nm wavelength. Best choice of narrowband H-alpha astrophotography filter for high-contrast imaging and revealing rich details of the nebula even in areas with strong light pollution.
Capacity
Connection ( to eyepiece) : 2"
Frame : 2"
passband (nm) : 656
Half-value width (nm) : 3
General
Type : Filters
Type of build : Line filter
Area of application
Useful for photographs : Yes
Anti light-pollution : Tes
H-alpha : Yes
Planetary nebulae : -
Supernova remains : Yes
Visually useful : Yes
Hydrogen nebulae : Yes
Nebulae & Galaxies : No
