Antlia ALP-T High-Speed 5nm Dual Band Filter - 2" Golden Filter for Astrophotography

The Antlia ALP-T HS 5nm 2" Dual Band Filter is meticulously crafted for professional astrophotographers aiming to capture the universe with unparalleled clarity and detail. This advanced filter is designed to specifically target the Hα and OIII spectral lines, optimizing your astrophotography sessions whether you're using a DSLR, a color camera, or a monochrome camera. It offers enhanced signal acquisition, with monochrome cameras benefiting from simultaneous dual-wavelength exposure, significantly speeding up the process.

Product Highlights

• High-Speed Adaptation: Perfectly tuned for astrographs with high lumens, ensuring peak performance by shifting the transmission band maxima towards longer wavelengths.
• Narrow Bandwidth: Features a narrow half-width of just 5 nm, providing a high signal-to-noise ratio and improving image sharpness and contrast.
• Light Pollution Reduction: High optical efficiency and density effectively combat light pollution, allowing for crisp imaging even near urban areas.

This filter is not suitable for visual or solar observation.

For detailed technical insights, please review the technical document.

Highlighted Features:

• Exceptional transmittance for Hα and OIII bands while blocking unwanted spectral lines.
• Compatible with DSLRs, monochrome, and color astronomical cameras.
• Optimized for use with f/2.2 - f/3.6 astrographs.
• Engineered to perform in environments with high light pollution.

Technical Parameters:

• Filter Type: Dual Band Filter
• Filter Diameter: 2"
• Filter Thickness: 2 ± 0.05 mm
• Filter Shape: Round
• Pass Bands: Hα, OIII
• Peak of Permeability (CWL) for Hα Band: 657.8 nm
• Half Bandwidth (FWHM): 5 nm
• Maximum Transmission: 88%
• Peak of Transmittance (CWL) for OIII Band: 502.2 nm
• Half Bandwidth (FWHM): 5 nm
• Maximum Transmission: >82%
• Blocked 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)
• Near Infrared Blocking: Up to 1050 nm
• Optical Density Equivalent for Blocked Lines: >OD4.5 (300 - 1050 nm)
• Frame: Black, Anodized
• Holder Thread: M48x0.75

Included in the Set:

• Antlia ALP-T HS 5 nm 2" Dual Band Filter

Guarantee:

This product comes with a 36-month guarantee, ensuring your satisfaction and confidence in your purchase.