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Baader H-alpha / O-III / S-II 6.5nm Narrowband Filter-Set 31 mm - CMOS optimized
Baader H-alpha / O-III / S-II 6.5nm Narrowband Filter-Set 31 mm - CMOS optimized
Baader H-alpha / O-III / S-II 6.5nm Narrowband Filter-Set 31 mm - CMOS optimized
 

Baader H-alpha / O-III / S-II 6.5nm Narrowband Filter-Set 31 mm - CMOS optimized


Manufacturer: Baader Planetarium


Product.Nr.: BP#2961651

EAN: 4047825103901

products condition: new

Manufacturer: Baader Planetarium

410,00 EUR
incl. 19 % VAT

  • Nicht auf Lager Nicht auf Lager
 
  • Model: Set: H-a / O-III / S-II 6.5nm | 31mm

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product description

  • Ø 31 mm x 2 mm
  • 6.5 nm FWHM
  • Recommended for optical systems from f/10 to f/3.5
  • Reflex-Blocker™ hard coated
  • Planeoptically polished
  • Life-Coat™ : sealed coating edges
  • Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim
  • Optimized for modern CMOS cameras (no DSLRs, but "Astro"-CMOS-Cameras (ALccd/QHY etc.))
  • Excellent for CCD camera technologies
  • Precision Grade
We explicitly warn against observing the sun with a Deep-Sky 6.5 nm (equivalent to 65 Ångström) H-alpha narrowband filter.
High quality H-alpha solar filters start at 0.8 Ångström. Photographic experiments with a camera are theoretically possible, but by no means observe the sun with naked eyes – you endanger your eyesight!

The new generation of Baader CMOS-optimized filters is characterized by the following properties

  • Increased contrast
  • Ever more narrow passbands
  • Reflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics (Reducer, Flattener, etc.)
  • FWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s/n ratio
  • Identical filter thickness to existing standards, with utmost care for parfocality
  • Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter
  • Each filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)
  • Life-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment

Technical Data

  • Transmission Range : H-alpha
    CWL (Central Wavelength) : 656.3 nm
  • Transmission Range : O-III
    CWL (Central Wavelength) : 500.7 nm
  • Transmission Range : S-II
    CWL (Central Wavelength) : 671.7 nm
  • HBW (Halfbandwidth) : 6.5 nm
  • Thickness : 2 mm
  • Planeoptically polished (1/4 Lambda)
  • AR-Coating : Reflex-Blocker™ hard coated
  • Life-Coat™
  • Blackened edges
  • Filter sizes : 31 mm, round
  • Filter mounted : Unounted
  • Baader-filterbox, combinable

Scope of Delivery

  • Baader H-alpha / O-III / S-II 6.5nm Narrowband Filter-Set 31 mm - CMOS optimized
  • Baader-filterbox/Filter, combinable

NB= Narrowband / CWL= Center-wavelength / FWHM= full width at half maximum / AR= Anti Reflection Coating.

Reviews

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Manufacturer identification

Name: BAADER PLANETARIUM GmbH
E-Mail adress: kontakt@baader-planetarium.de
Streetaddress: Zur Sternwarte 4
ZIP Code: 82291
City: Mammendorf
Country: DE
Phone: +49 (0) 8145 - 8089-0
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