2012年4月13日星期五

Astronomy 36mm Green/Red/Blue Light gree Filter

Astronomy 36mm Green/Red/Blue Light gree Filter
Red The red filter blocks blue and green light nearly in total, which means you get a very strong contrast, for instance, between bluish toned structures and the brighter details on Jupiter's and Saturne's clouded surface. However, this filter is mainly used to observe Martian polar caps.
http://www.siliconray.com/sr-astronomy-36mm-green-red-blue-light-gree-filter.html
Blue The light blue filter is suitable for Moon, Mars, Jupiter and Saturne observation. It improves contrast on faint areas without affecting the planet's brightness, which is why this filter is often used in combination with others.

Green  The light green filter is ideal for observing the ice caps on Mars and the yellowish sand storms on the Martian surface. It also improves the contrast of reddish and bluish structures in Jupiter's atmosphere.