Which is why I chose that spot size :P Technically it is possible to focus on things a bit smaller than a wavelength, but not by much and some of the options d

Which is why I chose that spot size :P Technically it is possible to focus on things a bit smaller than a wavelength, but not by much and some of the options don't even work far from the lens itself. https://en.wikipedia.org/wiki/Diffraction-limited_system#The_Abbe_diffraction_limit_for_a_microscope https://en.wikipedia.org/wiki/Diffraction-limited_system#The...