Antlia H-alpha 4.5 nm EDGE Filter 2 inch Mounted
279.00
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Antlia H-alpha 4.5 nm EDGE Filter 2 inch Mounted
The Antlia H-alpha 4.5 nm EDGE 2 inch mounted filter provides over 90 % transmission at 656.3 nm, revealing faint H-alpha nebula structures. Designed for narrowband astrophotography, it ensures excellent contrast and superior signal-to-noise ratio.
Antlia H-alpha 4.5 nm EDGE Filter 2 inch Mounted
Description
The Antlia H-alpha 4.5 nm EDGE filter is engineered for imaging deep-sky H-alpha emission nebulae at the 656.3 nm line. Its optimized spectral profile (4.5 nm FWHM) and OD5 out-of-band blocking deliver more than 90 % peak transmission and outstanding results even on fast optical systems down to f/3.
A single non-glued substrate eliminates internal reflections and halos around bright stars. All edges are blackened to suppress stray light, ensuring superior optical uniformity.
The Antlia EDGE filter maintains high transmittance and contrast under both dark skies and light-polluted environments. It is ideal for capturing emission nebulae, planetary nebulae, Wolf-Rayet objects, and supernova remnants.
This filter is designed exclusively for astrophotography. It must not be used for solar or visual observation.
Technical Specifications
Manufacturer: Antlia
Product: H-alpha 4.5 nm EDGE Filter 2 inch mounted
Type: narrowband H-alpha filter
Central wavelength (CWL): 656.3 nm
Full width at half maximum (FWHM): 4.5 nm
Peak transmission: > 90 %
Out-of-band blocking: OD5 (300–1000 nm)
Optical substrate: single, non-glued
Filter thickness: 2 mm ± 0.05 mm
Surface quality: 60/40 (MIL-O-13830)
Transmitted wavefront: λ/4 or better
Parallelism: < 30 arcsec
Filter mount: 2 inch (M48 x 0.75)
Clear aperture: 48 mm
Weight: approx. 0.01 kg
Application: astrophotography of H-alpha objects
Not recommended: solar imaging, visual observation
Antlia H-alpha 4.5 nm EDGE 2"
Antlia H-alpha 4.5 nm EDGE Filter 2 inch Mounted
The Antlia H-alpha 4.5 nm EDGE 2 inch mounted filter provides over 90 % transmission at 656.3 nm, revealing faint H-alpha nebula structures. Designed for narrowband astrophotography, it ensures excellent contrast and superior signal-to-noise ratio.