Antlia O-III 50 mm 4,5 nm EDGE

The Antlia O-III 50 mm 4.5 nm EDGE is an advanced filter designed specifically for professional astrophotography. With a half-width transmission window (FWHM) of 4.5 nm, this filter efficiently captures light at a wavelength of 500.7 nm emitted by ionized oxygen atoms. This feature is particularly crucial when photographing emission nebulae, making the Antlia O-III filter an invaluable tool for astrophotographers.

This filter effectively eliminates unwanted components from sodium and mercury lamps while ensuring high transmittance for the O-III spectral line. The O-III line holds great significance in astrophotography, and the Antlia O-III filter excels in capturing this crucial wavelength. Manufactured with a high-quality glass substrate, it minimizes the risk of internal light reflections, enhancing image quality.

What sets the Antlia O-III 50 mm 4.5 nm EDGE filter apart is its steep slope of the permeability window. Unlike conventional broadband filters, it maintains consistent transmittance without a significant decrease resulting from the shift of the maximum permeability peak (CWL). This unique characteristic allows the Antlia 4.5 nm EDGE filter to perform exceptionally well with telescopes of varying light intensity. The manufacturer's data confirms that these filters can be successfully used in optical systems with a maximum light power of f/3.

It's important to note that the O-III filter is not recommended for visual observation or solar observation.

Highlights of the Antlia O-III 50 mm 4.5 nm EDGE Filter:

Bandpass filter made on a high-quality optical substrate, maximizing transmission for radiation at 500.7 nm.

Compatible with astrographs with light intensity up to f/3, minimizing signal loss.

Half bandwidth of transmission (FWHM) of 4.5 nm.

Optical density equivalent OD5 guarantees efficient removal of light pollution.

Technical Parameters:

• Filter Type: Bandpass Filter
• Filter Diameter: 50 mm
• Filter Thickness: 3 ± 0.05 mm
• Filter Shape: Round
• Pass Bands: O-III (500.7 nm)
• Location of Maximum Transmittance Peak (CWL): 500.7 nm
• Half Bandwidth (FWHM): 4.5 nm
• Maximum Transmission: >85% ± 1 nm from the maximum transmission peak
• Blocked Light Pollution Bands: Mercury Lamps (435.8 nm, 546.1 nm, 577 nm, 578.1 nm), Sodium Lamps (598 nm, 589.6 nm, 615.4 nm, 616.1 nm)
• Optical Density Equivalent for Blocked Lines: OD5 (300 - 1000 nm)
• Surface Quality Index (According to MIL-O-13830): 60/40
• Parallelism: 30"
• Manufacturing Accuracy (RMS): λ/4

Set Elements:

• Antlia O-III 50 mm 4.5 nm EDGE Filter

Guarantee:

The Antlia O-III 50 mm 4.5 nm EDGE filter comes with a 3-year manufacturer's warranty covering delamination of the filter and substrate.