The objective at the highest position, the 4x objective should of course not touch the slide. Close the condenser and looking through the eyepiece lower the stage using the coarse focus until you see a clear image. Only rotate the coarse focus into one direction and stop when you see a clear image.

When you hold a microscope slide, you should never hold the slide in the center. Why? Because if you hold it in the center, the slide will get dirty and the specimen that you will put on that slide might get dirt or when you look at that specimen with the dirty slide, it might not show you a precise image.

Firstly, always make it a point that the high power objective lens should never touch or break the coverslip but if the high power objective lens touches or breaks the coverslip, then don’t use the high power magnification and during usage of high power magnification, only the fine knob adjustment should be used.

When viewing any slide with a microscope, a small square or circle of thin glass called a coverslip is placed over the specimen. It protects the microscope and prevents the slide from drying out when it’s being examined. The coverslip is lowered gently onto the specimen using a mounted needle .

Stage clips hold the slides in place. If your microscope has a mechanical stage, you will be able to move the slide around by turning two knobs. One moves it left and right, the other moves it up and down.

The function of the microscope is to resolve, or distinguish, fine detail which our eyes alone cannot perceive. This cannot be done unless there is sufficient visibility, or contrast, which describes the magnitude of the differences in the image between the features of the image and its background.

Eyepiece: The lens the viewer looks through to see the specimen. The eyepiece usually contains a 10X or 15X power lens. Diopter Adjustment: Useful as a means to change focus on one eyepiece so as to correct for any difference in vision between your two eyes.

ALWAYS use both hands when picking the microscope up and moving it from one place to another. 3. When focusing on a slide, ALWAYS start with either the 4X or 10X objective. Once you have the object in focus, then switch to the next higher power objective.

An eyepiece for optical instruments consisting of two identical plano-convex lenses with their convex faces pointing towards each other. They are separated by a distance of two thirds of the focal length of either lens. It was invented by the British optical instrument maker Jesse Ramsden (1735–1800).

So, basically a Plossl eyepiece is a type of eyepiece that enables the viewer to see a wider field of view than would normally be the case, but at the cost of him/her having to physically put his eye very close to the lens of the eyepiece.

about 180

Generally, a magnification of 30-50x the aperture (in inches) works well on nights of average-to-good seeing. For example, if you have a 4-inch telescope, try 120x to 200x. If you have an 8″ scope, try 240x to 400x. Again, experiment to get the best view each night.

Only Mars can get as close though it can never get as bright because it is smaller and less reflective than Venus. Through binoculars, it shows phases in the same way that the Moon does. It can be round the other side of the Sun, when it has a small apparent size and shows a full disc, like the full moon.

For a beginner hobbyist in Astronomy these Celestron SkyMaster 20×80 Binoculars offer a truly inspiring view of the moon, the orion Nebula, venus, saturn, star clusters, etc, that you can not even begin to see this clear and detailed with the naked eye.

The best binoculars for long distance