Antlia ALP-T Dualband 5nm Ha and OIII filter

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

Capture H-alpha and OIII nebulae simultaneously with the Antlia ALP-T Dual Band 5nm filter. Ideal for color cameras (OSC) and equally effective for monochrome sensors, this filter maximizes contrast while drastically reducing light pollution.

Key features

• Double band Simultaneous transmission of H-alpha (656.3nm) and OIII (500.7nm) lines.
• Ultra-tight FWHM of 5nm for each band, increasing contrast.
• Delete OD4.5 undesirable wavelengths (light pollution, sky glow, moonlight).
• OSC and monochrome compatibleperfect for DSLR, CMOS and CCD cameras.
• Ion Gun Assisted Deposition coating technology for maximum spectrum and transmission stability.
• Near infrared (NIR) rejection up to 1100nm for optimum image quality.

Ideal applications

• Astrophotography of emission nebulae (H-alpha and OIII)
• Working in light-polluted environments (Bortle 5 to Bortle 8)
• Photographic sessions under the presence of the Moon
• Use with high-speed optics without significant signal degradation

Technical specifications

Available formats and indicative prices

• Mounted 2" (M48x0.75): USD 380
• Unmounted Ø36mm (B-4836 adapter included): USD 298
• Other sizes: availability to be confirmed

Filter design

• Ultra-thin cell to reduce vignetting
• Black anodized finish
• Weather-resistant laser engraving

Field-proven performance

The Antlia ALP-T 5nm filter has been tested on a number of well-known deep-sky targets:

• IC434 (Horsehead Nebula) - 24 exposures of 300s each
• NGC2244 (Rosette Nebula) - 30 exposures of 300s each
• NGC6960 (Western Veil Nebula) - 7 exposures of 300s each
• IC63 (Cassiopeia Phantom) - 32 exposures of 300s each
• Betelgeuse and Aldebaran (magnitude tests)

All images taken under a Bortle 5 sky with a Skywatcher 130mm f/5 + MPCC corrector, Losmandy G11 mount, IMX571 camera.

Safety warning

Never use this filter to observe the Sun. This could cause serious eye damage.