Date: 1/15/2011
Location: Sam Bruno, CA
Instrument: Orion Mak Cassegrain with Imaging Source DMK camera at f/d 15
Infrared Filter Astronomik IR Pro 742
Processing: Avistack for Image stacking, Astraimage Wavelet processing, Photoshop CS4
Seeing: 3-4/10
The use of the Infrared pass filter (pass wavelength above 742nm) allowed to eliminate turbulence. Not only the image was much more stable but showed also improved contrast (compared to a regular Infrared Cut filter).
Even if the IR pass filter cuts luminosity, the moon is such a bright object that each frame can be still taken in a short amount of time (1/10 second for this picture).
More on my blog http://messier42.us ...