[Peter Ward]

I know the thought of parting with about $A 800 or so for a new 1.25" ultra narrow band h-alpha is a bridge too far for many.

But..... I have a pristine condition Custom Scientific, 1.25" 3nm H-alpha filter (attached pic) that can be yours for half that.

Asking $400

Be quick! ...my other NB set on IIS sold within 48 hours