Jean Dragesco had some great (film based) examples of H-alpha photography
using DayStar filters with C14's from the mid 1990's.
Daystar's however needed very long F-ratios to work well.
Tube currents would have been problematic with the C14, plus newer front Etalon based systems allow you to vary the focal length with no penalty.
Even though I have a Coronado system, the test bang for buck IMHO are the pressure tuned 80mm Lunts which should deliver similar results to what I get... eg:
http://www.atscope.com.au/BRO/gallery121.html