Goto camera attributes and you can reduce the "near clipping plane" you can also do this from preferences.
Take care though, as one might think it a good idea to set the near clip plane to a ridiculously small value and then be able to zoom in really close, but this will create all kinds of artifacts when you zoom out to normal distances.
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675