still for sale. I don't know anything about the UHC S filter, so I can't say which is better. What I do know is the OIII is amazing on orion nebula through a 13mm Nagler
Hey Stephen,
soory mate just been given some unexpected bills so the O111 will have to wait a while.
I have been lucky enough to borrow an 8mm Ethos and with the UHC filter the Orion Nebula is prity good.
Maybe next time!
mike.