2″ Antlia ALP-T Dualband 5nm Ha and OIII Highspeed filter

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

Optimize your high-speed astrophotography with the Antlia ALP-T Dual Band 5nm Highspeed filter. Designed for high-speed lenses (f/2.2 to f/3.6), this filter simultaneously captures H-alpha and OIII emissions while effectively reducing light pollution.

Key features

• Optimized double band for high-speed optics with controlled center wavelength shift.
• High-performance transmission 88% in H-alpha (657.8nm) and 82% in OIII (502.2nm).
• Tight bandwidth of 5nm for exceptional contrast and isolation from nebulous emissions.
• Delete OD4.5 on 300-1050nm, effectively blocking light pollution, moonlight and NIR.
• Compatible with OSC and monochrome cameras DSLR, CMOS, CCD.
• Ion Gun Assisted Deposition technology for maximum coating stability and spectrum accuracy.

Ideal applications

• SHO astrophotography with color (OSC) and monochrome cameras
• Use under bright polluted skies (Bortle 5 to 8)
• Fast imaging projects with bright f/2.2 to f/3.6 telescopes
• Lunar sessions without significant loss of contrast

Technical specifications

Available sizes

• Mounted 2" (M48x0.75)
• Unmounted Ø36mm (with B-4836 adapter included)
• Other sizes: on request

Design and finishing

• Ultra-thin cell for reduced vignetting
• Durable black anodized finish
• Damage-resistant laser engraving

Important notes

• Not recommended for solar or night-time visual observation.
• Warning: Never look at the sun with this filter. This would cause serious eye damage.