I have a Lumicon 1.25 UHC filter for sale.
It has 90% transmission on the container.
But the additional trans specs listed on there are:
Hydrogen-Beta 486nm 87%
Oxygen III 496nm 91%
Oxygen III 501nm 90%
Hydrogen-alpha 656 --
I bought it new about a year or so ago. It is too dark for my viewing pleasure. It hasn't been used much and is in the original container.
I need to get $70 shipped and I will mail priority mail with tracking and insurance.
Thanks for looking.