Astronomik O-III Narrowband Filter for 2''
The Astronomik O-III filter is made for visual observing of gas nebulas
and planetary nebulas. The transmission is very narrow, more than the
UHC filter. By that it results in a much higher contrast. Especially at
Super Novae like the Cirrus Nebula or Planetary Nebulas the more in
contrast may be crucial for seeing or not.Which objects could be observed:
This filter enables you to observe Super Novae or Planetary Nebulas with a much higher contrast.For which telescope this filter can be used:
We recommend the O-III filter for telescopes from 150 mm aperture
onwards. With smaller telescopes you won´t have enough light. Here it´s
better to use the UHC or UHC-E. From 25 cm aperture onwards most star
observer prefers the O-III over the UHC.Delivery contains:
Astronomik O-III narrowband nebula filter for telescopes from 150 mm aperture onwards.