User blog comment:Admiral Phoenix/Ahem. I think Theo made some stuff...../@comment-27797576-20140616023324/@comment-11135771-20140616154551

My guess is that the field would probably deflect shells to some extent (though 204cm and doomsday guns would be almost totally unaffected) and mess up missile guidance pretty badly, but wouldn't be able to be activated too close to friendly ships without disabling and causing severe damage to them. However, lasers don't work like that. Unless they are extremely high powered (in which case you'd be better off just using them as weapons), a field of lasers won't do anything to a missile or cannon shell. The only way for lasers below say, a few gigawatts of power to work against projectiles is for them to actively track and fire on the incoming munitions. A field of them being used as a shield, however, would not work unless they were above the aforementioned power range, and in that case it would simply be inefficient and extraordinarily power consuming to use.