Old/vintage lens is fully manual no electric contacts on the lens, camera and flash is set to manual, the flash is in cameras hotshoe, I have also enabled “release w/o lens “ in camera menu, and the flash will not fire.
I don't know what Nikon cameras you used, but I used a lot and the cameras that had a low-pass filter looked better than the ones that didn't have when you zoomed in that insane way: D The low pass filter towards the smoothing you show, but it took away the sharpness of the photo. Anyway, I left Nikon because I was not comfortable with the number of failed cameras they sent me. You should never keep something that does not satisfy you. But I don't know anything about this, the experts are you