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The Konus #5250 4x Achromatic Objective Lens fits the Academy, Campus, and College series microscopes. You simply unscrew one of the existing objectives and replace it with this 4x objective. Though 4x is supplied on the microscopes listed, it is easy to accidentally collide with the specimen and damage the objective.
The 4x provides lower-magnification, wider-field viewing of specimens. It is best suited to studying a large portion of a slide. At such lower effective magnification, it isn't necessary to involve the expense and extra glass of apochromatic lens design.
Provides reduced magnification and widest possible viewing field