BAADER OIII VISUAL FILTER 2" telescope - M48 thread for most

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

Diameter 200 mm (8")

such as the GIOTTO 430

Focuser weight

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

BAADER OIII VISUAL FILTER 2" telescope - M48 thread for mostThe 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.