CLS-CCD Filter
CLS-CCD broadband filters suppress artificial pollution and skyglow. High transmission near OIII (496 nm and 500 nm), Hβ (486 nm), NII (654 nm and 658 nm), Ha (656 nm), and SII (672 nm) is paired with a source-stated cutoff range of 300-1100 nm to suppress low-frequency stray light. Suitable for professional color CCDs or modified DSLRs and line-emission nebulae, planetary nebulae, or supernova remnants. Frame and packaging: M48*0.75 thread; aerospace aluminum; one-piece CNC; fine sandblasting, anodizing, and internal light suppression; permanent laser engraving; PP box with imported high-pressure white EVA; 340 g silver-card carton with dense foam; sizes 1.25 and 2 inches; ROHS pass. Spectral notes: transmission >95% near OIII (496 nm and 500 nm), Hβ (486 nm), NII (654 nm and 658 nm), Ha (656 nm), and SII (672 nm). Blocking stated as 0.1% suppresses urban Na at 589 nm, Hg at 578 nm, and IR. Contrast increases, not brightness.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Dimensional Specifications | 1.25'' , 2'' |
| Transmittance | Transmittance Above 95% for Important Nebular Emission Lines (Such as H-Alpha, OIII, SII, H-Beta) |
| Blocking | >OD3 (0.1%) for Light Pollution Lines Such as Na:589nm and Hg:578nm/435nm |
| Filter Glass Thickness | 1.85mm |
| Glass Material | Schott, Germany |
| Surface Finish | 60/40 (US Military Standard MIL-O-13830) |
Applications
Key Features
Datasheet
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