A 6.5 pair of binoculars has an objective focal length of 26 cm. If the binoculars

Question:

A 6.5 × pair of binoculars has an objective focal length of 26 cm. If the binoculars are focused on an object 4.0 m away (from the objective), what is the magnification? (The 6.5 × refers to objects at infinity; Eq. 25-3 holds only for objects at infinity and not for nearby ones.