Ronald Moravec , Jul 29, 2007; 03:21 p.m.
Reach means nothing. Image is simply cropped in camera so image looks like a 75mm lens instead of a 50.
Big sensors are better no mater what the MP count is. Large numbers of smaller receptors generate more noise and are less sensitive than the larger receptors that are on a larger sensor. 8 on a small sensor is equal to perhaps 12 on a large,but as you enlarge, the 12 will remain sharp longer.