Question: 200mm lens how much zoom?
Answer: The 200mm focal length on a full frame SLR will appear to be a 5.7x zoom. The 200mm focal length on a 20D will appear to be a 9.1x zoom. The 70mm focal length on a full frame SLR will appear to be a 2x zoom. The 70mm focal length on a 20D will appear to be a 3.2x zoom.