I read somewhere that today a 100 times magnification requires a oil objective and very sturdy microscope frame. In Wikipedia they wrote that The single-lens m

I read somewhere that today a 100 times magnification requires a oil objective and very sturdy microscope frame. In Wikipedia they wrote that The single-lens microscopes of van Leeuwenhoek were relatively small devices, the largest being about 5 cm long. They are used by placing the lens very close in front of the eye, while looking in the direction of the sun. So van Leeuwenhoek was able to look in tiny device pointed to the sun and incredibly close to his eye and magnifying up to 275 time or more? Incredible, specially for someone like me who has shaky hands and poor vision!