Main SpecificationModelA23.1604-AA23.1604-ATA23.1604-BA23.1604-BTTotal Magnification 6x-55x(standard), extend total magnification: 3x-330x8x-70x(standard), extend total magnification: 4x-420xHeadBinocularTrinocularBinocularTrinocularEyepieceHigh eye point and wide field eyepiece SWH10x/