Askar ColourMagic Ultra 2" Duo-Band E1 & E2 Filter Package - CM-DUO-E-PKG Celestron AVX Telescopes allowing users to fix periodic

allowing users to fix periodic error in the field

For 30 years

Prism Size:  14*10mm

The base has a wide diameter of 2 inches for 360 degree precision pan measurement

a velvet-lined interior absorbs any additional stray light and excess moisture

Askar ColourMagic Ultra 2" Duo-Band E1 & E2 Filter Package - CM-DUO-E-PKG Celestron AVX Telescopes allowing users to fix periodicThe Askar ColourMagic Ultra E Filter, as its name suggests, boasts "Ultra" halo control capabilities. With the ColourMagic Ultra E Filters, you can capture high quality deep sky images even in areas affected by urban light pollution, atmospheric airglow, or other light sources. The narrower bandwidth of both filters (one at 3nm & the other outside of 3nm) and high transmission significantly enhances image contrast, making it easier to reveal subtle