Which lenses does NOT affect the magnification of the specimen?

The lens that does not affect the magnification of the specimen is the ocular lens, or eyepiece, when it is used in conjunction with a fixed objective lens. While the ocular lens contributes to the total magnification when combined with the objective lens, it does not independently change the specimen's magnification. Instead, the objective lenses are primarily responsible for magnifying the specimen, with their varying focal lengths determining the level of magnification.