5 No, at high power objective cannot focus at all three threads at a time. Low power (4X) objective provides the greatest depth of filed. ConclusionTo sum, the microscope is a very important and useful tool in biology, and learning how to use it is beneficial.

The 4X lens is called the scanning or low power lens. It has the widest field of view, allowing you to look at large parts of the specimen, and the greatest depth of field. The 10X lens is sometimes called medium power because it produces mid-range magnification.

If your eyes are too close set or far apart for the intraocular distance to be adjusted properly, you will have to use your microscope as a monocular instrument (i.e. look through one eyepiece with one eye). If you do this, it is important to keep both eyes open in order to avoid eyestrain.

With a large depth of field, all of the threads can be in focused at the same time. With a narrower depth of field, only one thread or a part of one thread can be focused at a time.

Compare the orientation of the letter “e” as viewed through the microscope with the letter “e” viewed with the naked eye on the slide. This demonstrates that in addition to being magnified the image is inverted….

The field of view is largest on the lowest power objective. When you switch to a higher power, the field of view closes in towards the center. You will see more of an object on low power.

An eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes. The objective lens or mirror collects light and brings it to focus creating an image. The eyepiece is placed near the focal point of the objective to magnify this image.

400x

Focus (fine), Use the fine focus knob to sharpen the focus quality of the image after it has been brought into focus with the coarse focus knob.