Once you have explored the threads at 40X, switch to a higher powered objective. This is the same slide at 100X (10X eyepiece and 10X objective). You probably notice three changes from the previous photo. First, the threads look larger, which is what we expect. You will also notice that the photo is a bit darker than it was at 40X.objective. In order to positively identify these cells YOU MUST USE YOUR OIL IMMERSION OBJECTIVE. (You cannot return to 40X, but you can use your 10x by rotating nosepiece through the 4x objective). Rather than trying to identify every cell that you see, work your way through the erythroid
Draw what you see. 3. Examine a piece of color print from the newspaper, notice how it is printed as compared to what we see. Part 2: Calculating Magnification Fill in the magnification of each objective and the eyepiece of your microscope. To determine the total magnification, multiply the magnification of eyepiece by the objective lens.