For Sale: Orion Skyglow Filter. Threaded for rear cell of an SCT. Used only a few times on a 6" refracter. Still in like-new condition. Comes with original box. What a great stocking stuffer... for yourself, eh?
Currently $80 from Orion. This one is yours for $50 plus shipping.
Would also be interested in trading for a good quality 2x barlow in excellent condition with boxes and case.