Question

Question #2897d

Answer 1

It will be the lense with the lowest magnification on it.

Explanation:

The longer the focal length of the objective lense, the lower the magnification, because the primary image is allways formed at a set distance from the objective lens (usually about 230 mm). For a low power magnification (remember that `N=b//v`) we also need a longer object distance, so also a longer focal length.