Antlia Infrared Pass Filter from 685 nm, 1.25"

Antlia Infrared Pass Filter from 685 nm, 1.25"

The Antlia IR Pass 685 nm filter is an absorptive filter that allows infrared light with wavelengths of more than 685 nm to pass through. 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.

With this filter it is also possible to image the other planets during daylight due to the dark background sky created by the 685 nm IR Pass Filter.

This filter is only suitable for imaging with cameras not equipped with an IR blocking filter, not visual observing, and never look at the sun with this filter!