um, gigantic arrow is flying straight at you, how hard is it NOT to lock on if you can practically see only that arrow?I don't think so, if you watch the sasuke v kakashi fight he warps the susano'o arrow in the blink of an eye
i agree with this statement completelyThe only problem with Kamui is that it consumes lots of chakra and that the main weakness of Kakashi.
Also, when he needs to use it on defensive mode, he does it in a blink as Sharingan permits him to depict motion.
But in offense, as the user tries to resist by escaping continuously, it's much more difficult.
It's very much similar to Amaterasu. Sasuke uses it so effectively and quickly for defense with Susano'o but when he needs to strike someone directly, it's much more difficult. They are two great techs but that's definitely better in defense for now.
Deidara was pretty far in the air, coz he was not letting them to close but keeping them at a distance. Deidara couldn't move, coz he was being sucked in. The reason why he survived with just an arm missing was because Kakashi was not very good at aiming the Dimensional portal and couldn't keep it steady because of the distance and because of his inexperience with Kamui.i was saying that all he had 2 do was make a small vortex in front of his face and tthe arrow and rocket would just go in it without having 2 lock on. another question how far was deidara and what were his movements?
no its as fast as amaterasu....Does kakashi need much time to lock on a target and suck it up by a mangekyou ..!!!!