Object distance from lens refers to the distance between the object being observed and the lens of the instrument or device used to view it. It is an important factor in determining the quality and accuracy of the image produced.
The closer the object is to the lens, the larger it will appear in the image, but there will also be a smaller depth of field and potential distortion. As the object moves further away from the lens, the depth of field increases and the image becomes clearer and more focused.
Object distance from lens is typically measured in millimeters (mm) or centimeters (cm) for smaller objects, and meters (m) or kilometers (km) for larger objects. In some cases, it may also be measured in feet (ft) or inches (in).
The shape of the lens can affect the distance at which an object can be viewed clearly. For example, a convex lens can magnify objects at a greater distance compared to a concave lens, which may only produce a clear image at a closer distance.
Yes, object distance from lens can be changed by adjusting the position of the object or the lens itself. In some cases, the use of additional lenses or equipment, such as a microscope or telescope, can also alter the object distance from the lens.