The Optolong 2" L-eNhance is a dual-band pass filter that effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines to achieve a maximum transmission of up to 90%. The performance of this filter delivers results that control the impact from light polluted skies in a major way.
Technical Data
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Substrate: B270
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Thickness: 1.85 mm
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Surface Quality: 60/40 (Refer to MIL-O-13830)
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Fine-optically polished to ensure accurate 1/4 wavefront and < 30 seconds parallelism over the both surfaces
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Tpeak: T>90%
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Blocking Range: 300 nm - 1000 nm
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Blocking Depth: Light pollution line blocking >99%
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Parallelism: 30s
- Multi-layers of anti-reflection coating