Astromania 1.25" O-III Filter - Enhances Contrast During Visual Observation of Gaseous and Planetary Nebulae in All Sky Conditions, The Veil, Ring, Dumbbell and Orion Nebula, Among Many Other Objects

Highlights

• 1.25 inch O-III Filter greatly enhances contrast during visual observation of gaseous and planetary nebulae in all sky condition; allows high-contrast imaging even in areas with strong light pollution
• Especially useful for large aperture telescopes through which the light of the Moon can be extremely overwhelming; allowing just for the Double Ionized Oxygen lines between 496nm to 501nm to pass through at 95 percent
• Completely blocks virtually all other visible wavelengths of light so views of nebulas are optimized; increases contrast through selective filtration-Anti-reflection coated to prevent glaring and ghosting
• Not only useful at light-polluted sites; the contrast is also increased at dark sky sites; can be used with all 1.25 inch eyepieces; filter made from high-grade glass with dichroic interference and antireflection coatings
• Each Astromania 1.25inch O-III Filter is individually inspected and proudly inscribed with the percentage of light transmittance of the two O-III emission lines