BAADER HYDROGEN ALPHA 6.5nm

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This Badder Ha filter only used once. It's CMOS OPTIMIZED. and at 6.5nm its compatible with fast optical systems. It's in its original  case and if you look online the 2 inch sells for over 300.00. Hey fellow astrophotographers I have been in the hobby since 1973 and have lots of equipment I no longer can use so I can give you all great bargains for equipment all in excellent condition. Please include 10.00 for shipping and the necessary shipping materials.