Baader 2 inch (50.8mm) infrared pass filter blocks wavelengths below 670 nm
Multi-layer dielectric coatings are plasma-assisted and ionbeam-hardened using the latest technology.
The Baader IR-Pass filter blocks wavelengths below 670 nm. At these longer wavelengths, planetary images are less disturbed by wavefront distortions in the atmosphere. By combining a luminance image taken with the IR-Pass filter, along with RGB frames, overall image sharpness is significantly enhanced. Some of the world's best amateur planetary images have been taken with this technique.