Astromania 2" 2 inch to M48X0.75 Adapter for Telescope Eyepiece Lens - Bundle with - 2" Narrowband NBPF Hydrogen-a 12nm Filter

Astromania 2" Narrowband NBPF Hydrogen-a 12nm Filter. Astrophotography under a light-polluted night sky can be difficult. The solution is an H-alpha filter. The Astromania H-alpha cut-off filter works to filter out a large part of this light pollution. This convenient filter only allows 12nm bandwidth of light centered on a wavelength of 656nm to pass through, which means it blocks a large part of the scattered light and also blocks the light from artificial mercury and sodium-vapour lamps. Young stars embedded in the bright red of a nebula - an H-alpha filter is the expert if you want to capture hydrogen nebulae in all their glory. The Astromania H-aplha cut-off filter enhances the contrast between object and sky, allowing you to take good quality images even under urban skies. Metal filter cell threads directly into the 1.25-inch barrel of your telescope eyepiece. Mounted in a nicely anodized housing.

• Astrophotography under a light-polluted night sky can be difficult; the solution is an H-alpha filter; the Astromania H-alpha cut-off filter works to filter out a large part of this light pollution
• Allowing 12nm bandwidth of light centered on a wavelength of 656nm to pass through; 90 percent transmission at H-alpha line 656nm; that means the filter also blocks the infamous stray light and light from mercury and sodium vapour lamps
• The Astromania H-aplha cut-off filter enhances the contrast between object and sky; allowing you to take good quality images even under urban skies
• This auction is for one high quality 2inch to M48X0.75 adapter for telescope
• Standard 48mm "M48x0.75" male thread on one side to connect to diagonal body; the female thread "M48X0.75" at the rear end to accept 2inch astronomy filters; male thread M48X0.75; tube length:39mm