[gameprogrammer] isometric view in 3D

Has somebody deal with the problem of implementing an isometric like view in Ogre or some other 3d engine? I have achieved a look very close to old style games like Fallout, but I have a small problem. I want to provide camera rotation besides scrolling. With ogre it is trivial, I have a target node and a camera node. The camera node tracks target node, so I just have to rotate or translate target to get camera rotation and scrolling. The problem is that I thought that the correct camera angle for iso view was 45 degrees, so I placed my camera at x,y,z, with y==z, but I found that such setup places the rotation point in some place on upper screen border instead of the screen center. if I reduce z, then the view becomes less isometric and more top-down like. Also tried approaching the camera but then I ran into troubles with near clip distance. 
Can somebody give me an idea?

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