How can I make a perfect circle in blender? I noticed that Bezier Circle and Nurbs Circle both are not. I was trying to make a camera rotate around a fixed point, but those circles don’t work. I can see the camera shaking left-right. 
you can get it to move better, by parenting it to an armature, and rotating the armature.
Oh I was dumb. I figured it out my self 1 minute after the post 
I was using a mesh with only 1 vertex. Then I know an empty is enough. 
Yah, an empty is probably easier than an armature 
doesn’t matter, really. same principle. ( but id you have segments on your armature, you can use it much in the same way, as an industry type camera platform with the arms and wht not, eh? )
NURBS circles are perfect circles
Bézier are not
And both need to have a resolution carefully set.
Stefano