Bresser 1.25″ O-III Nebula Filter 6.5Nm for Enhanced Astronomical Exploration

One Of The Most Important Obstacles For The Exploration Of The Night Sky Is The Brightening Of The Night Sky By Artificial Lighting, Such As Streetlights. The Night Sky Is Not Really Dark In The Vicinity Of Towns Or Cities, Which Reduces The Visibility Of Objects Beyond The Solar System Enormously. Depending On The Type Of Celestial Object, It Is Possible To Increase The Contrast Dramatically By Blocking The Interfering Artificial Light.

The Explore Scientific O-Iii Filter Uses A Characteristic Property Of The So-Called Emmission Nebulae. Those Objects Glow In Special Colors, The So-Called Emmission Lines. Those Emmission Lines Are Linked To Chemical Elements – In This Case Oxygen. The Explore Scientific O-Iii Nebula Filter Blocks All Other Colors (And Thereby Nearly All Of The Artificial Light) And Only The Two Emmission Lines Of The Oxygen Can Pass The Filter. The Result Is Astonishing: Suddenly, Nebulae Are Visible In Locations That Were Completely Empty Without Using Filters. In Suburban Skies, For Example, The Veil Nebula Ngc 6992 Is Almost Invisible With A 200 Mm Telescope. By Using This Filter You Can See The Nebula And Its Structures Without Any Difficulties. A Must For Every Visual Observer And For Astrophotography.