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Baader H-beta 8.5nm CCD Narrowband Filter

£159.00
SKU 2458426
Size

Availability: Immediate Dispatch

  • 1¼" Baader H-Beta CCD-filter 8,5nm with 1¼" (28,5mm) filter thread
  • For focal ratios between f10 and f2.8
  • H-Beta-CCD-narrowband-filters can also be used for visual observations! (A high-quality alternative to the old Lumicon-H-Beta-Filters)
  • Anti reflection coating, fineoptically polished
Description

The Baader H-Beta-Filter with 8.5nm half width is especially useful for telescopes with 8" or larger apertures or if you are working with large exit pupils. This narrowband-filter delivers a much higher contrast, compared to common visual H-beta-filters. H-Beta-nebule-filters with a wider half-width deliver a brighter image and will also show you e.g. the California nebula,but it won't be so clear, and you will miss many of its inner structures. Without any filter, this nebula (to name just one of many) will be completely invisible under brighter skies.

Specifications
MANUFACTURER Baader Planetarium
TRANSMISSION RANGE H-beta
FILTER THICKNESS (WITHOUT CELL) 2 mm / 3 mm
HBW (HALFBANDWIDTH) 8.5nm
CWL (CENTRAL WAVELENGTH) 486 nm
AR-COATING dielectrically coated, planeoptically polished
FILTER USAGE CCD, H-Beta, IR-Cut
FILTER MOUNTED Mounted (LPFC 6mm) / Unmounted
TYPE OF FILTER Narrowband
SINGLE OR SET? Single Filter
FILTER SHAPE round / square