supplementary swivel lens for additional magnification.Particularly scratch-proof lens with high visual comfort.Choice of 3 different colour temperatures via filters.Product PropertiesAspheric PXM® lightweight [...] Size100 x 50 mm Miscellaneous Properties (magnifying glasses) NotesAplanatmagnifier headLupentopf inkl. LED-Batteriegriff Operating unit (magnifying glasses) Magnification3.9 xDioptre11.4 dptMaterialsmanual_system