Lumicon Oxygen III (OIII) Filter - SCT Rear Cell - (Preowned) 11 mm Eyepieces 25" Eyepiece Adapter Specifications

25" Eyepiece Adapter Specifications

The internal surfaces are all fully sharp V-threaded and blackened to eliminate stray light reflections

An optional Barlow lens (NOT included) can provide additional magnification for high-resolution planetary

Using Celestron telescopes from his home in Texas

This iOptron CEM40G mount includes a dual saddle plate that accommodates both Losmandy-type and Vixen-style dovetail plates

Lumicon Oxygen III (OIII) Filter - SCT Rear Cell - (Preowned) 11 mm Eyepieces 25" Eyepiece Adapter SpecificationsThis 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