... to use control functions, conveniently located below the screen Auto Lensmeter 1.Easy to use control functions, conveniently located below the screen ... . Lenses0±10D0.01D,0.12D,0.25DCyl. Axial Angle0~180°1°Prism0~10Δ0.01Δ,0.12Δ,0.25ΔADD0.10D0 ... Compensation numbers20,30,40,50,60Lens DiameterΦ10mm~Φ90mm Auto Lensmeter