BAADER OIII VISUAL FILTER 2" telescope such as the GIOTTO 430

such as the GIOTTO 430

8" and a resolution of 8

- M48 thread for most of the cameras with medium-large sensor as well as filter wheels and off-axis guiders

The caps feature knurled rings for easy gripping and are anodized for durability

Focuser weight

BAADER OIII VISUAL FILTER 2" telescope such as the GIOTTO 430The Baader OIII Visual filter is a 10nm visual narrowband filter designed to accentuate the contrast of emission and planetary nebulae. The high transmission at the Oxygen III line (502nm) results in a bright, contrasty image in telescopes with an aperture of 6" and larger. The optical surface is fine optically polished so that there is no loss of sharpness at high magnifications, even when the filter is positioned far in front of the focal point.