Coronado BF15, 15mm 1-1/4" H-ALPHA Secondary Blocking Filter for Solar Viewing - for SolarMax 40, 60, 90 & 140 Solar Filters & Telescopes with Focal Lengths of up to 1500mm
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What's Included With This Item:
- Coronado Five-Year Warranty Against Manufacturer's Defects
- Please NOTE: Yhe Blocking Filter CANNOT be used without a SM Front Cell