What are the advantages of a low power objective?
The low power objective is useful for allowing you to focus your lens on the object that you wish to study without too much difficulty. Then it should be possible to simply switch to a higher power objective lens without having to do more than make a small adjustment to the fine focus knob. Another advantage of the lower power lenses is to allow scanning for something that may be of interest, without needing to examine each field in minute detail when the organism/organelle of interest is not present. When you see something of potential interest, you can then switch to a higher power lens.
