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Howie Glatter Holographic Attachment with Concentric Circle pattern
Removable diffractive optical element for use in Glatter Holographic Collimators. A nine-concentric circle pattern that spans 10 degrees and will reach to the edge of f/ 5.7 optics. Recommended for scopes around this focal ratio or slower. The Laser light is spread over a smaller area it is brighter than the square grid pattern, this makes it particularly...