Optolong UHC Filter 1.25 inches

Optolong UHC Filter 1.25 inch: More contrast on emission nebulae

UHC stands for Ultra High Contrast: this filter primarily allows the emission lines of nebulae (including H-beta, OIII, and H-alpha) to pass through while blocking light pollution from streetlights and skyglow. Emission nebulae like the Orion Nebula or the Ring Nebula visibly gain contrast from this, even when viewed through the eyepiece.

Under a light-polluted sky, a UHC filter is often the difference between a faint suspicion of a nebula and truly seeing it.

Features

• Transmission of the main fog emission lines
• Mercury and sodium lighting and skyglow block
• For visual and photographic use
• Multi-layer coated glass in a thin metal frame

Compatibility

Fits M28.5 x 0.6 thread in eyepieces, diagonal mirrors, and camera nosepieces with 1.25 inch connection.

Specifications

You can find more accessories for this merk at the Optolong merk page.