Which one is OK?
This is the first I have seen it.
This is the first I see it.And this;
I see it for the first time.

Question

Which one is OK?
This is the first I have seen it.
This is the first I see it.And this;
I see it for the first time.

Answer

This is the first time I have seen it is the best one. 
This is the first time I see it - doesn't make sense
I see it for the first time - makes sense, but this form would be used in more of an event of enlightenment or epiphany :)