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More products from the brand :Antlia

Antlia 4.5nm Edge OIII filter

Price range: CHF 199 through CHF 359

Free delivery
Easy, free returns

Antlia OIII 4.5nm EDGE filter

Explore OIII nebulae with unrivalled contrast thanks to the Antlia OIII 4.5nm EDGE filter. Specially designed for deep-sky astrophotography, it maximizes the useful signal while suppressing unwanted noise.

Why choose the Antlia OIII 4.5nm EDGE filter?

  • High transmission (>85% at 500.7nm) to capture the faintest structures of OIII nebulae.
  • Narrow bandwidth of 4.5nm for exceptional contrast between subject and sky background.
  • OD5 deletion unwanted wavelengths to minimize light interference.
  • Fast compatibility up to f/3 without significant signal loss.
  • Premium manufacturing with one-piece optical substrate, scratch-resistant surface treatment and blackened edges.

Ideal applications

  • Imaging OIII nebulae
  • Observation of planetary nebulae and Wolf-Rayet
  • Capturing supernova remnants
  • Imaging polluted skies or dark sites
  • Extended imaging time even under moonlight

Filter technical specifications

Features Detail
Type OIII 4.5nm EDGE
FWHM (Full Width at Half Maximum) 4.5nm
Center wavelength (CWL) 500.7nm
Maximum transmission >85%
Out-of-band blocking OD5 (0.001%) between 300-1000nm
Filter thickness 2mm ± 0.05mm (50mm: 3mm ± 0.05mm)
Substrate Unglued monoblock optical glass
Surface quality S/D 60/40 (MIL-O-13830 standard)
Transmitted wavefront λ/4 or better
Parallelism <30 arcsec
Warranty 3 years against delamination

Available sizes

  • Mounted: 1.25″, 2″
  • Unmounted: Ø31mm, Ø36mm, Ø50mm

Frame features

  • Ultra-thin cell for reduced vignetting
  • Black anodized finish for durability
  • Weather-resistant laser engraving

Spectral curves

Important notice

Never look directly at the sun with this filter. This would cause serious eye damage.

 

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