Dave writes: > Changing focal length alone can definitely alter the relationship between > objects as seen in your view finder. This will be readily apparent if you > spend a moment with a zoom lens. Sorry Dave - it may appear this way but if you try this experiment you'll see it's not as your mind percieves it. Fit your camera to a tripod and lock on a 28mm lens and take a pic. Fit a 100mm and take a pic. If you print both pics they will look quite different but if you enlarge the centre of the shot taken with a 28mm so it frames the same as the 100mm shot, it will look identical. This is because there is no difference in the spatial relationship between the objects, the different focal lengths are just showiung you more or less of the scene I have done a full sequence of shots showing this relationship, and once someone sees it they comprehend immediately even though it seems counter intuitive compared to what you see through the finder. karl
