Askar ColourMagic Ultra 2" Duo-Band E2 Filter - SII + OIII - CM-DUO-E2 vendor-bresser The ZWO ASI991 SWIR operates

The ZWO ASI991 SWIR operates in the 400nm to 1800 um wavelength

5 " (1790 mm) Maximum Height (with center column down) 58" (1475 mm) Minimum Height 18

Lunt Solar Internal Double Stack Module

This is one of the beauties of the Petzval design

Askar ColourMagic Ultra 2" Duo-Band E2 Filter - SII + OIII - CM-DUO-E2 vendor-bresser The ZWO ASI991 SWIR operatesDesigned for deep sky imaging with color astro cameras, the Askar ColourMagic Ultra E2 filter, as the name suggests, includes "Ultra" halo control capability. When shooting deep sky galaxies with colour cameras, a duo narrowband filter in the H and O bands is often used; whereas with a mono camera, a narrowband filter in the H, S and O bands is often used, leaving users with colour cameras missing one band of nebula detail. This can be compensated by