The telescope lens has a focal length F1 = 30 cm, and the eyepiece has a focal length F2 = 4 cm. The telescope is set to infinity. Where should the aperture be placed so that the field of view is sharply limited? What is the angle of field of view if the aperture diameter is 12 mm? What is the angular magnification of the pipe?Note. Angular magnification is the ratio of the tangents of the angles formed by the outgoing and incoming beams with the optical axis.
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