A laboratory travelling microscope with an accuracy of 0.1 mm0.1 mm0.1 mm and a magnification of 1000X1000 X1000X would typically possess the following specifications: Optical System Magnification: A total magnification of 1000X1000 X1000X is achieved through the combination of an eyepiece and objective lenses. Eyepiece: A 10X10 X10X Ramsden eyepiece with a cross-line graticule is commonly used. Objective: Achromatic objectives with varying focal lengths, such as 2 inch2 inch2 inch or 3 inch3 inch3 inch, are employed to provide the desired magnification.