Used Baader O-III Nebula Visual Filter (10nm), 2" Pier Extension Conditions:

Conditions:

which provide high contrast viewing while minimizing chromatic aberration

StarPointer Pro was designed for astronomers by astronomers to provide the easiest experience locating celestial objects in the night sky

50mm achromatic objective lens with adjustable focus

Quantum Efficiency

Used Baader O-III Nebula Visual Filter (10nm), 2" Pier Extension Conditions:Condition: This is a used Baader O III 10nm visual filter in very good condition with mostly clean optics. There is some minor spotting; see the photos. It comes in its original jewel case. Description: Quick Overview Baader 2 OIII filter improves contrast of nebulae for visual observation and imaging 10nm passband includes OIII (501nm) and H Beta (486nm) wavelengths emitted by diffuse and planetary nebulae and supernova remnants Superior fine optical