Omegon Filters 1.25'' Deep Sky Filter
Omegon Deep Sky Broadband Filter - Increases the contrast of deep sky objects
The Omegon Deep Sky Filter increases the contrast of deep sky objects. It can be used for both visual observation and astrophotography. The filter blocks artificial light sources and redisplays the nebulae.
For visual observation and small telescopes
Have you ever looked at a photo of the Earth taken from space at night? A sea of artificial light spreads over the continents. Streetlights, building lights, and other artificial light sources can rival the light from astronomical objects available to astronomers.
Using a deep sky filter does the trick to see objects clearly, despite this light pollution. This broadband filter is suitable even for smaller telescopes.
For urban astrophotography
Even comparatively short exposures will normally show an extremely bright sky under a light-polluted city sky. But the deep sky filter allows you to take the most beautiful exposures even here. You can extend your exposure time while maintaining a dark, clear sky. You will have more contrast and the night sky will remain dark, with your astronomical object clearly visible.
Keep the good, throw out the bad: there are good and bad wavelengths
The deep sky filter only lets through light that is important for viewing. These are mainly the hydrogen lines at 486nm and 656nm and the doubly ionized oxygen lines at 496nm and 501nm. Nebulae, for example the Orion Nebula, only shine within these tiny regions of the spectrum.
Light from sodium and mercury vapor lamps, the normal artificial light sources, are blocked.
The advantages in a nutshell:
deep sky filter for visual observing and astrophotography
plano-optical surfaces, dielectrically coated
universal broadband filter to get started in observation using filters
blocks artificial light sources
1.25" filter thread for screwing into eyepieces and camera adapters
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