Omegon Clear Sky filter for small telescopes - Against night glow and residual light The night never becomes completely dark because artificial lighting and luminescence itself do not allow it. This light is annoying during astronomical observation. The Clear Sky filter blocks the wavelengths in question and the images consequently acquire greater contrast. It also prevents most of the residual light from reaching the eyepiece and disturbing the viewer.
It is ideal for small and medium-sized telescopes up to 150 mm in diameter (approx.) and is very easy to use: Simply screw the filter into the 1.25" filter thread of the eyepiece. The sky will appear darker and the more detailed and sharp objects.
In summary:
Clear Sky filter against annoying light
For small and medium telescopes
Allows ONLY useful wavelengths to pass
1.25" thread compatible with any eyepiece of this size.