Antlia ALP-T Dual Band 5nm Ha & OIII Filters

The Antlia ALP-T Dual Band 5nm Filters are premium dual-line pass filters designed to enhance astrophotography by isolating H-alpha and OIII emission lines. Available in both Standard and Highspeed versions, these filters provide unmatched performance for a range of optical systems, ensuring vibrant and contrasted nebula imaging even in light-polluted conditions.

Key Features

• Dual Bandpass: Captures H-alpha (656.3nm) and OIII (500.7nm) lines simultaneously for efficient imaging.
• Standard Version: Optimized for f-ratios slower than f/3.6, providing exceptional performance for most optical systems.
• Highspeed Version: Tailored for fast optics between f/2.2 and f/3.6, with a slightly shifted passband to maximize transmission and contrast.
• Light Suppression: Advanced coatings achieve an optical density (OD) of 4.5, minimizing interference from light pollution, moonlight, and airglow.
• Minimized Halo Effect: Steep bandpass edges reduce internal reflections, delivering cleaner images around bright stars.
• Precision Manufacturing: Each filter is inspected with Agilent Cary spectrophotometers for consistent, reliable results.

Performance

The Standard Version excels with optics slower than f/3.6, offering balanced performance across most systems. For optics faster than f/3.6, the Highspeed Version ensures enhanced contrast and nebula visibility. While filters used with optics faster than f/2 may experience a 15–20% decrease in transmission due to wavelength shifts, they maintain exceptional imaging quality.

Applications

• Designed for use with DSLR, CMOS, and CCD colour cameras
• Compatible with one-shot colour cameras and monochrome setups
• Effective in light-polluted areas and under moonlit skies
• Ideal for capturing nebulae, supernova remnants, and other emission objects

Technical Specifications

• Bandpass: 5nm
• Optical Density: OD 4.5
• Transmission Efficiency: High transmission for H-alpha and OIII
• Coatings: Multi-coated to suppress unwanted light

Why Choose Antlia ALP-T Filters?

Whether you're using a standard optical system or fast optics, the Antlia ALP-T Dual Band 5nm Filters deliver exceptional results. With their high transmission, superior contrast, and reduced halo effects, these filters offer a perfect balance of performance and value for astrophotographers seeking precision and reliability.