In practice, please set the correction collar as follows:• Set the correction collar on the objective to0.17 mm/to a marking that corresponds withthis value.• Use a position on the specimen with small structuresand as high contrast as possible. Focus thisusing the fine focusing control.• Carefully turn the correction collar in one directionand observe the change in imaging quality – payparticular attention to the contrast of the image.As a rule, the image sharpness is lost during thisprocess. This should be readjusted through continuousrefocusing using the fine focusing control.