For magnification m1:
i1=−m1o1,f1=o11+i11=o11−m1o11=o11(1−1/m1). By analogy for magnification m2:
f1=o21(1−1/m2) From the figure we see that
x=o1−o2→o2=o1−x, substitute this:
f1=o1−x1(1−1/m2), solve the system that consists of the last equation and this one:
f1=o11(1−1/m1). Simple math gives us the solution:
f=m1−m2x.
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