Turn the coarse focus so that the stage is as close to the objective lens as possible ... When first examining cells or tissues with low power, draw a diagram at this stage, even if going on ...

If looking at an object under the ×4 objective lens, light will have passed through ... Her teacher told her that the cells were 0.4 mm in length. Her drawing was 40 mm in length.

Photo by Andrew McKean The new SFL 50 line is available in 8×50, 10×50, and 12×50 configurations, and packs all the image brightness of a 50mm objective lens in the compact form-factor of a 42mm ...