From doing this lab with the microscopes i learned alot.  To tell what magnification you are using you just have to look at the dial in the middle of the microscope.  It will say 10x, 60x, or 200x.  To change it just turn the dial to the right or left.  This is for the digital microscope which you plug into the computer and view it on the screen.  To know what magnification you are using on the compound microscope look at the lens and it shows 40x, 100x, or 400x. To find something on the compound microscope you need to use the foci.(focuses). The coarse focus is used for the 40x and 100x magnifications, but when you use t he 400x magnification you need to use the fine focus for a more precise focus. On the digital microscope to find something you need to use the approproate zoom and use the nob to focus it. There are two different mounts. One mount is the dry mount which is when you put an object under the microscope and observe it. A wet mount is a object you put on a glass slide and put a few drops of water on the object and put a cover slip over it to avoid getting water on the lens. The field of vision is how much you can see though the microscope.