I have a 1.25 Lumicon UHC filter for sale. I found it too dark for my viewing. It is in great shape. I bought it new about a year ago and it's not been out of the box much at all.
It says 90% transmission on the container.
The other specs on there are:
Hydrogen-Beta 486nm 87%
Oxygen III 496nm 91%
Oxygen III 501nm 90%
Hydrogen-Alpha 656nm --
I need to get $70 Shipped for it.
Thanks for looking.