In good used condition for its age,and the optics all look nice but I have not tested it so please be aware before buying but I cannot see what could be wrong as the filters do not seem to have degraded over time
Front rejection filter is 77mm
Sold as is no returns
Remember this is a Hydrogen Alpha filter set and the sun can blind so if you are not sure what your doing then don't bother buying please
details from the web below:
Lumicon markets its 0.15nm bandpass system as a Solar Prominence Filter, but it can show filaments at times. It requires a telescope that will be at least f/20 with the ERF applied. One side of the disk-shaped filter has a tube that slides into a 2" focuser. The other side has an adapter for 11⁄4" eyepieces. The unit has a screw that turns a tilting mechanism to tune the filter to the Hα line.
I saw no hint of the chromospheric network through the Lumicon filter. However, I could see large filaments faintly against the solar disk. Prominences were best through this filter, appearing as bright red features projected against a reddish-brown background. Although contrast between prominences and the sky was less than through the other filters, prominences looked best through the Lumicon filter.