Ideal for high-magnification oil-immersion microscopy, the BRESSER 100x DIN Plan Achromatic Objective Lens produces flat and even fields of view from edge to edge with little or no spherical aberration visible. To protect the objective and your specimen, the lens is spring loaded to absorb the impact and pressure in case it comes into contact with your slide or specimen. It is parfocal with other 45mm length objectives, so there will be little or no focus adjustment required when changing magnifications. Because of its high magnification potential, BRESSER recommends the use of immersion oil with this objective.