What instrument should be used to examine at greater that 200x?

To examine specimens at greater than 200x magnification, a compound microscope is typically used. These microscopes utilize multiple lenses to achieve high magnifications, often up to 1000x or more. For even higher magnifications, such as in the range of 1000x to 2000x, specialized microscopes like oil immersion microscopes or electron microscopes may be employed, depending on the specimen and the level of detail required.