Microscopic system deepening
When the microscope focuses on the object plane (i.e. alignment plane), the primary image formed by the objective lens is on the differentiation plate, and the position of the object plane located in the alignment plane or behind the alignment plane is measured and imaged by the microscope lens in front or behind the reticle plate. The image of the point object on the corresponding object plane on the reticle plate is no longer a point image but a diffuse spot.
The size of the diffuse spot in the microscope is related to the CNC diameter of the microscope lens, as well as the distance from the corresponding microscope object plane to the alignment plane. Obtaining a large depth of field is not difficult, but it is far from enough to only satisfy the requirement that all images are clear. Due to the abundance and complexity of natural scenery, it is often difficult to avoid some chaotic scenery during shooting. If these scenery is made as clear and prominent as the subject, it will inevitably interfere with the subject. At this point, learn to use the small depth of the scene to highlight the subject and related scenery, and blur some of the scenery, your photos will be more personalized.
The main way for a microscope to obtain a small depth of field is to open a large aperture and carefully focus on the subject you want to highlight, making other irrelevant or messy objects blurry and unrecognizable, only serving as an abstract formal space to complement the subject.
In actual shooting, the focus can be placed on the main body of the foreground, and the microscope lens can create a sense of space in the blurry foreground on the screen, while reducing the interference on the main body at a certain limit. Sometimes, chaotic vistas can form a texture effect after being blurred, making the image more chewy. You can also focus on the subject of the mid shot, blurring both the foreground and background, creating a clear visual guidance for the subject.
The third way to obtain a small depth of field is to blur the foreground, which creates a sense of being present. Modern photographers attach great importance to the illusory effect of the microscope's foreground, which highlights the authenticity and contingency of a glance back in photography, making people believe that the photographer captured the scene from the real scene, rather than intentionally manipulating it.
By using blurry, hazy, and illusory foreground to contrast or contrast the clear subject, not only will the picture appear concise, lively, and clean, but also the emptiness in some parts of the small scene depth can provide viewers with rich imagination, making the picture more implicit and charming.
