----------------------------------- MrMxyzptlk 28 Dec 2013 19:59 ----------------------------------- De privit pot sa privesti si chiar o sa vezi cu un filtru adecvat, insa uita de detalii si de culori. O sa vezi o pata si cam atat ... "An old favorite of mine is the Rosette Nebula (NGC 2237–39) to the east of Orion in the stellar wilderness we call Monoceros. Without a filter only a tiny glimmer of light is visible, but with an ultrahigh-contrast (UHC) filter the nebula bursts forth in spectacular fashion. I know of no other object in the sky where flicking a filter back and forth in front of a a naked eye produces such a wonderful effect. Indeed, about 1983 both Brian Skiff at Flagstaff, Arizona, and I independently viewed the Rosette with the naked eye and a nebula filter. The Rosette is one of the few deep-sky objects better seen with a telescope's finder than with the main instrument. With large binoculars and good observing conditions, the Rosette may appear as a formless aura of soft light encircling a cluster. But equipped with a proper filter, just about any telescope will show it. "