Compound microscope...Normal adjustment

In normal adjustment, of the compound microscope,, final image is formed at infinity, and eye is most relaxed ,intermediate image i.e. the image formed by the objective coincides with the (first ) focal point of the eye piece. The separation between the objective and eye piece can be found by adding distance of intermediate image from the objective and focal length of the eye piece.

The object is placed close to the (first) focus of the objective but kept away slightly away from the focus.

From different  desired considerations,it comes out that the focal lengths of both objective and eyepiece ,should be kept smaller.