LIGHT POLLUTION FILTER 2" FILTERS AGAINST THE DISTURBING LIGHT POLLUTION IN AND AROUND CITIES

SkyWatcher Light Pollution Filter 2"


LIGHT POLLUTION FILTER 2"
FILTERS AGAINST THE DISTURBING LIGHT POLLUTION IN AND AROUND CITIES

These filters in their black anodized aluminum mount are designed to filter out the disturbing light from mercury vapor lamps and other light pollution, while passing critical H-alpha and H-beta wavelengths better than competing filters. Bright, light-polluted skies appear much darker and the contrast between sky and object is visibly enhanced. This contrast enhancement effect is especially important for nebulae. Unlike stars, nebulae emit light only in a very limited wavelength range. These filters allow maximum transmission of the important wavelengths in H-alpha, H-beta, and the two lines of inonized oxygen, these are the most important wavelength ranges for nebulae. Observations of galaxies and star clusters also benefit from this filter, although not as much. Furthermore, contrast is improved for reddish details on planets. This filter works with all telescope sizes but is especially best suited for telescopes up to 114 mm diameter, where other filters take away too much light.

Scope of delivery:


Filter 2"
Storage box
TypeContrast enhancement filter
Connection2" (M48) filter thread