400mm Focal Length Professional Astronomical Refractor Filters Telescope 16-40×70

Item 16-40×70 Astronomical Telescope
Magnification 16x-40x
Optical system Refractive optical system
Focal length 400mm
Focus ratio 11.25
Eyepiece 10mm 25mm
Barov Extender 3x
Mirror 48°Erecting BAK4 prism
Optical Coating FMC Fully Coated
Exit Pupil Diam 2.2mm