Here I will be comparing 4 microscopes based on their image quality at 100x. They produce very similar results. The large microscoepe is an Olympus CH40, a “doctor’s microscope”, as I once read. I also have an Olympus CH-A which I got serviced. There is also a BMS 136 series educational microscope and the ELMO-2 was a fun weekend project – a LEGO microscope. I also have a Euromex stereo microscope.