BAADER IR-PASS FILTER 685nm

The Baader IR-Pass filter is a narrowband photographic filter designed for imaging in the infrared part of the spectrum between around 685nm. When paired with a camera that is sensitive in this region (such as the ZWO ASI290MM), this allows you to sharply reduce the effects of atmospheric seeing and capture fine detail on the Moon, Mars, Jupiter and the sun. This is particularly useful when using lucky imaging techniques with telescope larger than 5 - 8" in diameter. The filter completely blocks the rest of the spectrum below 670nm.

The optical surface is fine-optically polished so that there is no loss of sharpness at high magnifications, even when the filter is positioned far in front of the focal point. The filter is made from a Schott-equivalent RG 630 substrate with "super stacked" dielectric coatings for pure transmission. 

Available in 1.25" and 2" mounted. The filter cell is threaded on both ends so that multiple filters can be stacked. All Baader filters (excluding 100 x 100mm) come in stackable labelled filter boxes which can be attached to each other to form a sturdy filter library.