$59.00Last catalog price, March 2009
Catalog description
Baader Planetarium IR-Pass Telescope Filter, part number AAS013, is a discontinued product from the 2007–2011 catalog. It was last listed at $59.00, down from a high of $99.00.
Baader Planetarium delivers the latest tool in the planetary imager's bag of tricks. 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 (seeing). 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.
The IR-Pass filter shares the same outstanding features as all the other Baader filters. High optical quality Striae-free substrate and high efficiency multicoatings result in the sharpest and highest contrast image possible.
Catalog price history
| Observed | Listed price | Change |
|---|---|---|
| September 2007 | $59.00 | |
| October 2008 | $99.00 | +$40.00 |
| March 2009 | $59.00 | −$40.00 |
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