... (standard configuration)6X, 10X, 16X, 25X, 40X (professional configuration)Eyepieces 12.5XAngle between eyepieces: 13ºPupillary ... adjustment: 52mm~78mmDiopter adjustment: ±6DField of view: 40X (Æ5.5mm), 25X (Æ8.5mm), 16X (Æ13.5mm ... free,Cobalt BlueAperture diameters: Æ14mm,Æ10mm,Æ5mm,Æ3mmÆ2mm,Æ1mm,Æ0.2mmBaseLongitudinal movement: ...