Astronomik UHC Filter for 2''
The Astronomik UHC filter is one of the best we know for visual
observing. It reliable blocks the artifical light of our towns but the
important wavelengths O-III and H-Beta passes nearly to 100%. Additional
you will have an important window at H-Alpha. Many nebulas shines in
H-Alpha.Which objects can be observed:
The filter allows the contrasty observing of gas nebulas and planetary nebulas with very high contrast.With which telescopes the filter can be used:
of the high transmission also smaller telescopes from 80mm onwards can
be used. The filter is optimized for focal ratios between 1:4 and 1:20.Delivery contains:
High quality Astronomik UHC filter - also for smaller telescopes from 80 mm onwards.