Antlia Solar Discover Dualband Energy Rejection Filter (ERF) - 2 all astro filters opinie

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Antlia Solar Discover Dualband Energy Rejection Filter (ERF) - 2" is a professional solar filter that protects the optical system and camera matrix against thermal damage when photographing the surface of the Sun.

The optical design of the filter has been developed to provide the best possible protection for photosensitive matrices while optimizing transmission windows in the CaK, CaH and Hα bands. The Antlia Solar Discover Dualband Energy Rejection Filter (ERF) - 2" uses an advanced multi-layer coating applied to a high-quality glass substrate, which ensures its high durability and stability of the transmission window position. This filter does not provide complete protection against excess energy collected by the optical tube and is dedicated to work with Antlia Solar Discover 5 Å / 0.5 nm CaK, Solar Discover 3nm CaK Assembly, Dualband Hα, CaK and CaH filter Assembly filters.

Note! The Antlia Solar Discover Dualband Energy Rejection Filter (ERF) cannot be used as eye protection for visual observations.

The most important features of the Antlia Solar Discover Dualband Energy Rejection Filter (ERF) - 2"

• energy dispersive filter designed to photograph the solar surface in the CaK, CaH and Hα spectral lines
• made on a heat-resistant, double-polished glass substrate
• adapted to refractors with an aperture of no more than 110 mm

Technical parameters

• Filter type: Dual band ERF filter
• filter thickness: 10 ± 0.05 mm
• Filter diameter: 2"
• maximum aperture of the optical tube: 110 mm
• transmitted bands: Hα, CaK, CaH
• position of the maximum transmittance peak (CWL) for the Hα line: 656.3 nm
• Half width of the transmission window (FWHM) for the Hα line: 25 nm
• maximum transmission for Hα line: 90%
• position of the transmittance peak maximum (CWL) for the CaK and CaH lines: 393 nm with an overlap of the 393.3 nm (CaK) and 396.8 nm lines
• Half width of the transmission window (FWHM) for CaK and CaH lines: 25 nm
• maximum transmission for CaK and CaH lines: 90%
• blocking range: 200 - 1700 nm
• surface finish quality: λ/4

Set components

• Antlia Solar Discover Dualband Energy Rejection Filter (ERF) 2"

Guarantee

36 months