Comparison Andonstar AD210 vs Andonstar AD209

The range of magnifications provided by the device is from minimum to maximum.

The magnification of the microscope is calculated by the formula "the magnification of the eyepiece is multiplied by the magnification of the objective." For example, a 20x objective with a 10x eyepiece will give a magnification of 10*20 = 200x. Modern microscopes can be equipped with multi-objective turrets, zoom lenses (see below) and interchangeable eyepieces — so that in most models the magnification can be adjusted. This allows you to adjust the device to different situations: when you need to consider small details, a high degree of magnification is used, but to expand the field of view, the magnification must be reduced.

Detailed recommendations on optimal multiplicities for different tasks can be found in special sources. Here we note that many manufacturers go to the trick and indicate the maximum value of the magnification by the degree of magnification achieved with an additional Barlow lens. Such a lens can indeed give a serious increase in magnification, but it is not a fact that the image will turn out to be of high quality; for more details, see "Complete set".

The greatest working distance provided by the microscope.

The working distance is the distance from the lens to the object in question. This parameter is important primarily for stereomicroscopes (see "Type"): the more space remains under the lens, the more convenient it is to work with various tools and devices in the field of view of the device. However, here it should be taken into account that the maximum working distance is achieved at the minimum magnification factor, as the magnification increases, the lens has to be brought closer to the object in question. For biological microscopes, the working distance does not really matter: such devices work mainly with flat preparations, to which the lens can be brought almost close.