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Astronomy > Filters > Nebulae filters > H-Alpha Filters > Baader > f/2 Ultra-Highspeed > Baader Filters H-alpha CMOS f/2 Ultra-Highspeed 65x65mm
Product no.: 70934

Filters H-alpha CMOS f/2 Ultra-Highspeed 65x65mm

RRP: $ 790.00 Our price:
$ 710.00 incl. VAT plus shipping costs
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Product description

More about the series f/2 Ultra-Highspeed...

H-alpha filter passes light at 656nm wavelength. Best choice of narrowband H-alpha astrophotography filter for high-contrast imaging and revealing rich details of the nebula even in areas with strong light pollution,

Line filter with very narrow half-width for extremely fast optical systems from f/3.4 to f/1.8:

  • Specially designed for the special filter requirements when used with fast optics such as the Celestron RASA Astrograph.
  • The narrow half-width allows for maximum contrast even in the strongest light pollution, minimises star size and makes the finest nebula details visible – indispensable under Bortle 9/8/7/(6) skies.

Baader's CMOS-optimised filters are characterised by:

  • increased contrast
  • narrower half-widths (FWHM)
  • Reflex Blocker™ coatings for maximum insensitivity to retro reflection from nearby auxiliary optics, even under the most adverse conditions
  • FWHM carefully designed for each filter category to enable 1:1:1 exposures, matched to typical CMOS quantum efficiency and signal-to-noise ratio
  • Identical filter thickness to existing standards, with the utmost care taken to ensure homofocality
  • Blackened edges all around, with filter front indicator in the form of a black outer edge on the front to additionally prevent any reflection from light falling on the filter edge
  • Each filter is individually precision-polished and coated, with a sealed coating edge (NOT cut from a larger plate with exposed coating edges)
  • Life-Coat™: even harder coatings to enable an age-resistant coating with an unlimited service life – even in the most adverse environments

This new CMOS-optimised filter generation is designed to become the new standard in amateur astronomy.

Specifications

Capacity


Central wavelength (nm)
656,3
Half-value width (nm)
3,5
Frame
Frames
Mount material
Aluminium
Coating of optical system
Reflex-Blocker™
Appropriate for...
f/3.4 - f/1.8
filter thickness (mm)
2
Filter Size (mm)
65 x 65

General


Type
Filters
Type of build
line filter
Series
f/2 Ultra-Highspeed

Area of application


Useful for photographs
yes
Visually useful
no
Twin stars
no
Moon & Planets
no
Nebulae & galaxies
yes

Product safety

Manufacturer: Baader Planetarium GmbH, Zur Sternwarte, 82291 Mammendorf, DE, www.baader-planetarium.de
Baader Filters H-alpha CMOS f/2 Ultra-Highspeed 65x65mm
Light transmission curve

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