1.25" O-III Narrowband Filter

1.25" O-III Narrowband Filter1. 25" O III Narrowband Filter High Contrast for Nebula Observation Overview: The 1. 25" O III Narrowband Filter is specifically designed for enhancing the visibility of gas and planetary nebulae by isolating the two key oxygen lines, OIII (496nm and 501nm). This filter significantly improves contrast and makes faint nebulae more detectable, especially in dark skies, making it an essential tool for deep sky astrophotographers and visual observers

Blackened lens edges to suppress stray light and improve contrast

Other radios within range will alert with the distress call

Quality Aspects of Astronomik MaxFR Narrowband Emission Line Filters

Dimension :310*153*45mm

Spectrum Range: 300–700 nm

The watchband is made of silica gel

Spurious emission

25" O-III Narrowband Filter performs best with telescopes of 200mm and larger

The screen can record 6 groups of call information at the same time

Model SV28 Product Type 45-Degree Angled Magnification 25x-75x Prism Type Porro BAK4 Objective lens diameter 70mm Eyepiece lens diameter 21mm Eye cup Type Fold Down Close Focusing Distance  8m

Material: ABS plastic

and adds an extra layer of dust and water protection to boot