The H-alpha system is a very good individual solution for star friends, which will observe the sun in H-alpha light with a free telescope aperture of more than 100mm.
If you have already a H-alpha filter system with blocking filter and you will like this adapted on a telescope with greater aperture, I can offer a safe and ready to use modification unit.
The example picture shows a superb system with a Lunt LS50 etalon for working on the eyepiece site. Up to 4600mm equivalent focal length (6" refractor as example) you can also observe the whole sun disc with a long focal or wide field 2inch eyepiece.
With 4“ or 5“ free aperture with effective collimated 3000mm or 3600mm focal length (F30 aperture ratio) are amazing detailed solar observations possible with high magnification.
These great images were taken by Martin from Astroclub Radebeul with the Zeiss AS 150/2250mm Coudé refractor telescope with 125mm ERF, Coronado BF30 blocking filter, telecentric lens assembly with Lunt 35mm etalon (f=3150mm), camera DMK31 from Imaging Source