This unit is elegant in both apperance and engineering. It is ideal for domiciliary use with the following specifications: 

·          Measurement range +/- 25D (in steps of 0.125D over 0 to +/-5D), 0.25D (over 5D) 

·          Cylindrical axis 0 to 180 degrees (in 5 degree steps) 

·          Prismatic range up to 5D in 1D steps 

·          E.P adjustment +/- 5D 

·          Power source 220V 15W 

·          Dimensions 455 x 130 x 275 mm (H x W x D)

·          Weight 5.6 kg