The Nikon Plan microscope objective, x10/0.25 is also a valuable closeup lens for cameras when extreme closeups are required. Microscope lenses have no built in focusing method so I have used this one mounted on an Micro Four Thirds (Panasonic and Olympus) helical mount. I have included two pictures taken with this lens. I do not claim to be an expert but you can see particularly in the butterfly wing the amount of detail that can be captured.