Antlia Solar Discover Dualband ERF 2''
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Antlia Solar Discover Dualband ERF 2"

£98.00✓ 2 year warranty

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Out of stock due 10-15 working days
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About this product

Model:  antlia_dualband_erf2

Antlia Solar Discover Dualband ERF 2"

The Antlia Dualband ERF is designed to pass the Hydrogen Alpha, Calcium K-Line and Calcium H-Lines whilst rejecting NIR/IR and Near UV and protecting against heat build.

For apertures in excess of 100mm we recommend using a full aperture Energy Rejection Filter.

Product Features:

  • FWHM 25nm with CWL at H-alpha wavelength of 656.3nm; Transmission: T＞95%
  • FHWM 25nm with CWL at CaK wavelength 393.3nm covering Calcium K-Line 393.3nm and Calcium K-Line 396.8nm; Transmission: T＞90%
  • Coating Range: 200-1700nm wavelengths
  • Finished with the most advanced multicoating-s
  • Coated on heat resistant double-polished substrate
  • Antlia ERF 2’’ mounted filter is installed on the back end of the refractor telescope
  • Transmitted Wavefront: Lambda/4 or better. 

Specifications:

  • FWHM: 25nm
  • CWL (Central Wavelength):
    • H-alpha: 656.3nm 
    • CaK & CaH: CaK 393nm covering CaK 393.3nm & CaH 396.8nm 
  • Peak Transmission: 90%
  • Coating Range: 200-1700nm 
  • Filter Thickness: 10mm+/-0.05mm
  • Size: 2" round mounted

 

 

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