E lAlan f 2 L f D

giving for the Schwarzschild values of f , d and L and the usual normalization with y 1 = upr 1 = 1 the value

Table 3.8. Comparison of the essential parameters in the evolution of the aplanatic telescope (from [3.13])

Form

Primary f/no

m 2

Final f/no

bsi

bs2

Schwarzschild

f/7.5

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