Baader 3.5nm Ultra Narrowband H-Alpha Filter - 1.25"
Availability: Item has been discontinued by the manufacturer
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- Precision grade enforced H-alpha filter for f/10 to f/3.5 optical systems
- Opens up the extremely narrow 3,5nm H-alpha world
- This enforced contrast results in even fainter stars, providing more signal of faintest nebulae detail
- Manufacturing such ultra-narrow filter does require extreme coating homogeneity and very high CWL precision, which these filters are designed for. CWL= Center-wavelength / FWHM= full width half maximum.
Note: In general this DeepSky Ultra-Narrowband H-alpha Filter is not suitable for solar observation. The Halfbandwidth of 3,5nm equals 35 Ångstroem, high-quality H-alpha solar filter from SolarSpectrum start at 0.8 Ångstroem. At favorable conditions experiments might still be possible, although at lesser quality.
Specifications:
- Manufacturer: baader Planetarium
- Sku (#): 2459451
- Weight (kg): 0.066
- Colour: black
- Transmission Range: h-alpha
- Filter Thickness (without Cell): 2 Mm
- Hbw (halfbandwidth): 3,5 Nm
- Cwl (central Wavelength): 656,3 Nm
- Ar-coating: dielectrically Coated, Planeoptically Polished
- Special Features: enforced Narrowband
- Filter Size: 1 25 Inch
- Filter Usage: ccd, Deep Sky, H-alpha
- Filter Mounted: mounted (lpfc 6mm)
- Type Of Filter: narrowband
- Single Or Set?: single Filter
- Filter Shape: round
Manufacturer part number: FHALNU-1 or 2459451
WARNING: This filter is not designed for solar observation. NEVER use these filters for observing or imaging the Sun, or permanent eye and equipment damage will result.
| Product Banner Type | discontinued |
|---|---|
| Free Shipping Graphic | Free US Shipping |
| Hide Found a better Shipped Price on Frontend? | No |
- Precision grade enforced H-alpha filter for f/10 to f/3.5 optical systems
- Opens up the extremely narrow 3,5nm H-alpha world
- This enforced contrast results in even fainter stars, providing more signal of faintest nebulae detail
- Manufacturing such ultra-narrow filter does require extreme coating homogeneity and very high CWL precision, which these filters are designed for. CWL= Center-wavelength / FWHM= full width half maximum.
Note: In general this DeepSky Ultra-Narrowband H-alpha Filter is not suitable for solar observation. The Halfbandwidth of 3,5nm equals 35 Ångstroem, high-quality H-alpha solar filter from SolarSpectrum start at 0.8 Ångstroem. At favorable conditions experiments might still be possible, although at lesser quality.
Specifications:
- Manufacturer: baader Planetarium
- Sku (#): 2459451
- Weight (kg): 0.066
- Colour: black
- Transmission Range: h-alpha
- Filter Thickness (without Cell): 2 Mm
- Hbw (halfbandwidth): 3,5 Nm
- Cwl (central Wavelength): 656,3 Nm
- Ar-coating: dielectrically Coated, Planeoptically Polished
- Special Features: enforced Narrowband
- Filter Size: 1 25 Inch
- Filter Usage: ccd, Deep Sky, H-alpha
- Filter Mounted: mounted (lpfc 6mm)
- Type Of Filter: narrowband
- Single Or Set?: single Filter
- Filter Shape: round
Manufacturer part number: FHALNU-1 or 2459451
WARNING: This filter is not designed for solar observation. NEVER use these filters for observing or imaging the Sun, or permanent eye and equipment damage will result.
| Product Banner Type | discontinued |
|---|---|
| Free Shipping Graphic | Free US Shipping |
| Hide Found a better Shipped Price on Frontend? | No |