Technical Data:

• Schott optical substrate
  • 1.25”, 2” mounted, 31mm,36mm dia (2mm+/-0.05mm)
  • 50mm dia，50*50mm，65*65mm square (3mm+/-0.05mm)
  • Surface Quality: 60/40 (Refer to MIL-O-13830)
  • 2 sides fine-optically polished to ensure accurate 1/4 wavefront
  • 30 arcsec parallelism
• Center-Wavelength of Antlia H-Alpha 3.0nm filter: 656.3nm
• H-Alpha 656.3nm T＞90%, 90 % transmission at H-Alpha line at 656.3nm
• min OD5（0.001%）@ 300-1000nm
• Both sides with multi-layer anti-reflection coating
• Single / Non-glued substrate

Filter Cell (specifications for cell mounted filters only):

• 1.25” (M26*0.6)，2” (M48*0.75)
• Ultra-thin filter cell to minimize vignetting by maximize possible clear aperture
• Black Anodized Finish
• Non-Fading Laser Engraving

Available Sizes：

• Mounted： 1.25” & 2” (2mm thickness)
• Unmounted：Dia 31mm，Dia 36mm (2mm thickness)
• Unmounted：Dia 50mm (3mm thickness)
• Unmounted：50*50mm，65*65 square (3mm thickness)

Not Recommended:

• Solar Observing and imaging
• Visual observation
  • IMPORTANT! DO NOT LOOK AT THE SUN WITH ANTLIA FILTERS.
    Serious eye damage will result if you fail to observe the warning.

USER CONTRIBUTION:

MELOTTE 15 – “THE HEART OF THE HEART NEBULA” (IMAGE FURTHER BELOW...)

• Subject:                              Melotte 15 – “The Heart of the Heart Nebula”
• Imaging OTA:                     Sharpstar SCA260 – 1300mm, f/5.0
• Imaging Camera:               ZWO ASI2600MM-PRO
• Filters:                                 Antlia 2” Narrowband: Ha (3nm); Sii (3.5nm); Oiii (3.5nm)
• Filter Wheel:                      ZWO 7 x 2”
• Guide System:                    ZWO OAG-L with ZWO ASI174MM camera
• Mount:                                Skywatcher EQ6-R
• Capture Details:                 Ha: 30 x 300s; Sii: 26 x 300s; Oiii: 26 x 300s
• Integration time: 6h40’
• Bortle 4 over 4 nights

Courtesy of Alistair Scobie

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