[matt]

I have one of these for sale. $60 plus shipping.
The Astronomik ProPlanet 807 IR-pass Filter is ideal for imaging the Moon and planets, notably Mars with telescopes from 10" (250mm) aperture.

This filter is an ideal complement to the ProPlanet IR 742 for use with converted DSLR cameras, CCD cameras and Webcams. The effects of seeing are distinctly reduced. It is your entry into previously unknown dimensions of photography of the Moon and the planets.

The ProPlanet IR 807 only allows infrared light with wavelengths of more than 807 nm to pass. In this wavelength range the effects of seeing are significantly lower than in the visible spectrum of the human eye. This allows much sharper images than are usually obtained from your device and location. Another advantage is that the sky background of advanced dawn is dark and even allows photography of planets and Moon at daylight.