Baader 3.5nm Ultra-Narrowband H-Alpha CCD Filter - 31mm Round Unmounted
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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.
CLOSEOUT - All Sales Final!
Baader's new 3.5nm Narrowband Enforced H-alpha filter opens up the extremely narrow 3.5nm H-alpha world. This enforced contrast provides more signal of the faintest nebula detail. Manufacturing such ultra-narrow filters requires extreme coating homogeneity and very high Center Wavelenth Precision, which these filters have been designed for.
Specifications:
- manufacturer: Baader Planetarium
- sku (#): 2459452
- 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: 31 Mm
- filter Usage: Ccd, Deep Sky, H-alpha
- filter Mounted: Unmounted
- type Of Filter: Narrowband
- single Or Set?: Single Filter
- filter Shape: Round
Manufacturer part # # FHALNU-RD31 or 2459452
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.
Other Information
- Country of Manufacture: Germany
CLOSEOUT - All Sales Final!
Baader's new 3.5nm Narrowband Enforced H-alpha filter opens up the extremely narrow 3.5nm H-alpha world. This enforced contrast provides more signal of the faintest nebula detail. Manufacturing such ultra-narrow filters requires extreme coating homogeneity and very high Center Wavelenth Precision, which these filters have been designed for.
Specifications:
- manufacturer: Baader Planetarium
- sku (#): 2459452
- 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: 31 Mm
- filter Usage: Ccd, Deep Sky, H-alpha
- filter Mounted: Unmounted
- type Of Filter: Narrowband
- single Or Set?: Single Filter
- filter Shape: Round
Manufacturer part # # FHALNU-RD31 or 2459452
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.
- 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.
CLOSEOUT - All Sales Final!
Baader's new 3.5nm Narrowband Enforced H-alpha filter opens up the extremely narrow 3.5nm H-alpha world. This enforced contrast provides more signal of the faintest nebula detail. Manufacturing such ultra-narrow filters requires extreme coating homogeneity and very high Center Wavelenth Precision, which these filters have been designed for.
Specifications:
- manufacturer: Baader Planetarium
- sku (#): 2459452
- 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: 31 Mm
- filter Usage: Ccd, Deep Sky, H-alpha
- filter Mounted: Unmounted
- type Of Filter: Narrowband
- single Or Set?: Single Filter
- filter Shape: Round
Manufacturer part # # FHALNU-RD31 or 2459452
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.
Other Information
- Country of Manufacture: Germany