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PODSTAWOWY WZÓR!!
Z=1/F
Z1=4D
4D=1/f
f=0,025m=2,5cm
Z2=0
0=1/f
f=0
Z3=-2,5D
f=1/-2,5
f=-0,4m=-40cm
Z4=50D
f=1/4
f=0,25m=20cm
Z5=400D
f=1/400
f=0,0025m=0,25cm