F-2HA
Type : Small beam spot lens
Detection focal distance : 7 ± 2 mm
F-3HA
Type : Parallel light lens
Spot diameter : Approx 4 mm (at 0 to 20 mm)
F-4HA
Type : Small beam spot lens
Detection focal distance : 15 ± 2 mm
F-6HA
Type : Small beam spot lens
Detection focal distance : 35 ± 3 mm