Quote Originally Posted by danag42
The "official" designation of a Normal lens is one whose focal length equals the diagonal of the frame. For 35mm, it's a bit less than 50mm, but by tradition 50mm seems to dominate.

For APS-C a 30 or 31mm (like the Limited) lens would be more like a "normal" lens.

If you want the exact numbers, do the math. For whatever that's worth.
Thanks for the response.