Askar ColourMagic Ultra 2" Duo-Band E1 Filter - Ha + OIII - CM-DUO-E1 SCT Diagonal 4G & 5G) Wi-Fi technology

4G & 5G) Wi-Fi technology

and where refractors are their sharpest)

The dielectric coatings on the diagonal mirror provide a a highly reflective (99%) surface so that you lose very little light when doing astronomy

it can be directly threaded onto the 1

Askar ColourMagic Ultra 2" Duo-Band E1 Filter - Ha + OIII - CM-DUO-E1 SCT Diagonal 4G & 5G) Wi-Fi technologyDesigned for deep sky imaging with color astro cameras, the Ultra E1 filter, as the name suggests, includes "Ultra" halo control capability. Askar Ultra E1 duo band filter has an extremely narrow bandwidth, and an ultra high transmittance of over 85% at its center wavelength (500. 7nm and 656. 6nm). It can effectively eliminate the influence of light pollution. Even if you are in an area seriously affected by light pollution, pictures taken with the