Antlia Filters OIII 3 nm 36 mm (88246)
555.92 $
Tax included
OIII filters allow only light with a wavelength of 501 nanometres to pass through. This wavelength corresponds to the emission lines of doubly ionised oxygen, which are produced by planetary nebulae and certain emission nebulae. As a result, these objects remain visible while most other light is blocked by the filter. This selective transmission significantly increases contrast and makes faint nebulae visible for the first time.