I have had this filter for a long time and have never used it. I did buy it used, but for the life of me I can't remember what it is. When holding it up and looking through it everthing is a Blue/green color. So I think that it is a deepsky filter. ALso I'm not sure what it fits. See Photo it is not in the best of condition with some minor scraches on the glass.
Will take $25.00 Shipped in the US