What experiment? Are you asking if people have tried shooting photons through a tiny hole? Of course they have. (And yes, the beam spreads out).I meant photons can be more concentrated at a tiny hole than electrons.
So, you're saying that this experiment was also done using a tiny hole , and there was also interference/spread of photons ?.
I don't know if it's true or not that it's easier to focus a beam of photons towards a tiny hole than a beam of electrons, but it's not really relevant for the double slit experiment. I would guess that it's much easier to focus a beam of electrons, since their shorter wavelength should enable you to use a screen with hole in it to focus the beam. (If the size of the hole is just small enough to spread out a laser beam, it wouldn't spread out an electron beam significantly because their wavelengths are shorter).