Lumicon Oxygen III (OIII) Filter - SCT Rear Cell - (Preowned) type-flashlights-and-laser-pointers especially for doing your high-power

especially for doing your high-power viewing

true-to-life color

Striae-free substrate

Lunt Polarizing Filter for White Light Solar Wedge - 2"

Lumicon Oxygen III (OIII) Filter - SCT Rear Cell - (Preowned) type-flashlights-and-laser-pointers especially for doing your high-powerThis filter is used, in good condition. About the Lumicon Oxygen III (OIII) Filter SCT The renowned, original Lumicon OIII Filter narrow bandpass filter (11nm) isolates just the two doubly ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black background of space and the delicate photons of OIII light needed for