Antlia S-II 36 mm 4,5 nm EDGE

Antlia S-II 36mm 4.5nm EDGE Astrophotography Filter

Unlock the full potential of your astrophotography with the Antlia S-II 36mm 4.5nm EDGE Filter. This high-performance filter is tailored for professional astrophotographers aiming to capture the intricate details of emission nebulae.

Product Overview

Designed with precision in mind, the Antlia S-II filter features a narrowband half-width transmission window (FWHM) of 4.5 nm. It selectively transmits light at the specific wavelength of 671.6 nm, the emission line of doubly ionized sulfur atoms, crucial for photographing stunning celestial nebulae.

One of the key advantages of this filter is its ability to block unwanted light pollution from sources such as sodium and mercury lamps, while maintaining high transmittance for the S-II spectral line. This makes it an indispensable tool for capturing clear and vibrant images of the cosmos.

Constructed on a high-quality glass substrate, this filter minimizes internal reflections, ensuring superior clarity and detail in your astrophotographic pursuits. Its unique steep permeability window slope ensures consistent performance across a range of light intensities, suitable for telescopes up to f/3.

Note: This filter is not intended for visual or solar observation.

Key Highlights

• Precision-crafted band-pass filter optimized for 671.6 nm radiation.
• Seamless compatibility with astrographs up to f/3, minimizing signal loss.
• Remarkable half bandwidth of transmission (FWHM) at 4.5 nm.
• Optical density equivalent (OD5) for effective light pollution reduction.

Technical Specifications

Filter Type: Bandpass Filter

Filter Diameter: 36 mm

Filter Thickness: 2 ± 0.05 mm

Filter Shape: Round

Pass Bands: S-II (671.6 nm)

Peak of Transmittance (CWL): 671.6 nm

Half Bandwidth (FWHM): 4.5 nm

Maximum Transmission: >90% ± 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 (MIL-O-13830): 60/40

Parallelism: 30"

Manufacturing Accuracy (RMS): λ/4

Included in the Set

• Antlia S-II 36mm 4.5nm EDGE Filter

Experience peace of mind with a 3-year manufacturer's warranty, covering delamination of the filter and substrate. Elevate your astrophotography with the Antlia S-II 36 mm 4.5 nm EDGE filter and capture the wonders of the cosmos with unmatched detail and clarity.