Usually at the end there is a type of dial that you can turn and it could zoom in and out.
The ocular and objectives
Parcentric refers to the alignment of optical elements in a microscope so that the center of the field of view remains constant when changing objectives. Parfocal means that when changing objectives on a microscope, the image stays approximately in focus.
In a microscope, the stage controls the movement of the objectives. The stage can be adjusted vertically to bring the specimen into focus and horizontally to move the specimen under the objectives for viewing.
Microscope objective lenses typically have magnification levels ranging from 4x to 100x. The magnification power is usually marked on the objective lens itself. Higher magnifications require the use of immersion oil to achieve clearer images.
dust shied is the one top the objectives. It protects the objectives from dust.
A "parfocal" microscope maintains its position as objectives are changed.
the optical system of a microscope is the objectives
The objectives on what I have observed is.... it able us to see the tested specimen that is in the mouthpieceof the microscope and contains mirror inside ...
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The diagram on the microscope helps users understand the different parts of the microscope and their functions. It serves as a visual guide for locating the objectives, stages, focus knobs, and other components, making it easier to use the microscope effectively.
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low power objectives....
stage
To switch objectives on a microscope, you need to rotate the nosepiece that holds the objectives. Simply grasp the nosepiece and turn it until the desired objective clicks into place. Make sure to refocus the image after changing objectives to ensure a clear view.
The objective lens on a microscope is responsible for magnifying the specimen being observed. It gathers light rays from the specimen and focuses them to produce a magnified image. By changing objectives, you can adjust the level of magnification on the microscope.