Additional Information
| Diameter | 75 mm, 90 mm, 110 mm, 135 mm, 160 mm, 180 mm |
|---|
Baader D-ERF Energy Rejection Filter (75 – 290mm)
Delivery Time: approx. 2-3 workdays
- D-ERF (Dielectric Energy Reflection Filter) in different sizes
- Pre-filter to reduce heat during H-alpha observation with SolarSpectrum Filters
- Plane parrallel plate (without filter cell) with IR-Cut dielectric coating
- non-ageing sealed coating edges
- Half-Band-Width (HBW): 80 nm – see also graph
- Filter WITHOUT cell – 3D-printed filter cells – customized for your telescope, can be ordered in addition (not available as standalone product)
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