UP for sale a Coronado 40mm filter to double stack a PST to give about 5nm bandwidth so much more surface detail.
Has a tuner as well so maybe able to be teamed up with a blocking filter to make a solar scope , I'm sure others will know more about this .
Comes with case and caps.
Sells in the US for $795 plus post or the UK for 695 Quid
This one for $550 posted in Oz
PM if interested
Thanks
Zane