Features of TFK-20 52-60 5pc Set:
▪ PV Adjustable range (5 specifications): 52mm, 54mm, 56mm, 58mm, 60mm.
▪ Axial calibration on each diasc: 165º ~ 0º ~ 180º ~ 25º axis graduation line runs counter clockwise along axis graduation line of lens frame, with interval of graduation line being 5º.
▪ Lens rotates around optic axis inside lens frame: 360º.
▪ Range of left or right lens frame legs, length adjustment: 90m ~ 99mm, length of specification of trial frame increase 1mm in turn.