If the focal length of the object glass is 25 cm and the distance from object glass to the trunnion axis is 15 cm, the additive constant is_______________?
(A) 0.1
(B) 0.4
(C) 0.6
(D) 1.33
If the focal length of the object glass is 25 cm and the distance from object glass to the trunnion axis is 15 cm, the additive constant is_______________?
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