Antlia IR Pass 850nm planetary filter - 1.25''Mounted

The Antlia IR Pass 850nm filter is an absorptive filter that allows infrared

light with wavelengths of more than 850nm to pass through. It is a

supplement filter of IR Pass 685nm. At these longer wavelengths, the

sensitivity of the unaided eye is reduced, so it is not suitable for visual

observations. The filter is highly recommended for any planetary

photography. At long-wavelength spectral range the atmospheric air

turbulence (seeing) has much lower impact on the sharpness. The closer to

the infrared band, planetary images are less disturbed by wavefront

distortions in the atmosphere (seeing), result in the sharpest and highest

contrast image possible.

By combining a luminance image taken with the IR-Pass filter, along with RGB and U-Venus filters, overall image

sharpness is significantly enhanced and details of planets in different bands are taken.

The filter is also possible to image the other planets during daylight due to the dark background sky created by the 850nm IR Pass Filter.

Technical Data:

Schott optical substrate

1.25” mounted, (2mm+/-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

Filter Ring:

1.25”( 28.5*0.6 )

Ultra-thin filter cell to minimize vignetting by maximize possible clear aperture

Black Anodized Finish

Laser Engraving No Fading

Not recommended:

Solar Observing and imaging

Visual observation

DO NOT LOOK AT THE SUN WITH ANTLIA FILTERS.

Serious eye damage will result if you fail to observe the warning.