Who told you all of these? 照妖镜不翻上去，光怎么到得了CCD上？用脑子想一想啊！

Mirror lockup is for minimizing vib casued by mirror movement with low speed on a tripod... It is not applied to any handheld situation...

1/30' is not a problem with 16mm wide angle, it is ok with 50mm...maybe with IS or VR. It needs to be on a tripod if it is over 50mm or so...

不考虑焦距只谈快门，等于没说。