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More products from the brand :Antlia

Antlia 4.5nm Edge OIII filter

Price range: CHF 199.00 through CHF 359.00incl. Swiss VAT

Filter diameter

Clear

Free delivery in Switzerland or collection in Nyon

Returns subject to our terms and conditions of sale

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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