These go with the Lumicon 1.5 angstrom Solar Prominence Filter. I am using the main Filter with my C-8. Very Good condition. Make offer if interested.
The cost-effective Lumicon Solar Prominence Filter System consists of two components. The first is the Lumicon Prefilter that blocks all harmful radiation before it enters your telescope. This Prefilter is normally bonded to an optional off-axis mask specially made for your Meade or Celestron telescope, or, if you prefer, to your own homemade mask mounted securely over the front aperture of your telescope. With the Prefilter now mounted over the front of your scope in its mask or holder, only cool, safe red light enters your telescope. The second component of the Lumicon Solar Prominence Filter System is the delicate narrow-bandpass (1.5 Angstrom) filter located in the filter system's main body that is mounted on the focuser or eyepiece end of your telescope.