... Distance PLAN DIN Objectives: 10x (0.25 NA, 8.1mm Working Distance), 25x (0.40 NA, 4.8mm W.D.), 40x (0.60 ... NA, 3.3mm W.D.).Three Phase Contrast ( ... Distance PLAN DIN Objectives: 10x (0.25 NA, 8.1mm W.D.), 25x (0.4 NA, 4.8mm W.D.), and 40x (0.60 ... NA, 3.3mm W.D.).Objectives Designed for Cover ...