I sell Coronado H-alpha filter, transform your telescope in a SolarMax 40mm telescope. You can see the sun's chromosphere as the picture No.7
This stuff will transform your telescope into a Coronado H-Alpha telescope. To work correctly your scope shall have a focal length less than 500mm and you need to make a custom adaptor to mount one piece on the front of your telescope's main lens.I used it with a Takahashi FS60 scope so I already have the adaptor for this scope. If you also have this scope then you are already good to go because the adaptor is included in the package.Sell for 5000 RMB, new SolarMax scope with 40mm diameter costs 12K RMB. This stuff is made in USA.Link of new equivalent model: https://detail.tmall.com/item.ht ... d55e27b&abbucket=15
The stuff is in perfect working conditions as new.The picture No.6 shows my FS60 scope with Coronado filters mounted on. FS60 not included in the bundle.