Is there any connection between the lens of a camera and the lens of a microscope?

Generally, replacement is not allowed, except for photomicrography.

Camera lenses and microscope lenses are both multi-lens structures, equivalent to a convex lens.

The image field of the camera lens is flatter, which allows the image to be better projected on the photosensitive material. Microscope lenses generally do not pay much attention to the flatness of the image field, because the naked eye can correct the image field.

The structure of the camera lens allows it to focus only at a farther range. On the contrary, a microscope lens can only focus at a closer range.