Hi, if you take a look at the following screen shot: you will note that the spheres rendered at the center of the image are round while the spheres rendered at the edges are distorted.

My question is this: is there a way to get all the spheres to appear perfectly round?  The only method that I know of is to change the camera's Z location (moving away from the objects). However this results in the spheres being rendered at a much smaller size and reducing the usable screen area to a fraction of the actual screen size. 

I'd like to keep the size but lose the distortion.  Any tips as to tricks would be greatly appreciated.

Best Regards, Jim