Athabasca Circular STARRY NIGHT Filter description:
- Size : 77mm
- Filter Weight : 25 gram
- Package Weight : 74 gram
- Ring Color : Black
- Applicable Scenes : Night shot, Cityscapes, Galaxies, and so on
- Starry Night Filter DOES NOT increase the natural light and nebula brightness. Instead, this Athabasca STARRY NIGHT filter cutting off certain types of artificial light (mainly Na and Hg) and passing through other wavelenghts, especiallya the spectrum of emission nebulae. Hence, increases the contrast of nebula. However, not all pollution can be cut off (e.g: Xenon Headlights and still broadband light sources) .