What does “DIN” standard mean?
“DIN” is an abbreviation of “Deutsche Industrial Normen.” This is a German standard that has been adopted internationally as an optical standard used in most quality microscopes. The focal tube length of a DIN objective is 160mm. The former standard was RMS (“Royal Microscope Society”), which had a longer tube length (170mm). Most DIN optics can be interchangeable. However, DIN and RMS objectives are not interchangeable.
