by Rifleman » Sat Jan 26, 2008 9:30 pm
If you also see an sp570 along with the 560 you mentioned, you may be surprised at the 20x zoom factor, but don't be too misled by the zoom factor. A total zoom factor of 10x doesn't necessarily mean the objects will appear 10 times closer....what it means is that from the widest angle to the longest telephoto, will be 10x......for a 35mm equivalent explanation, a normal lens of 50-55 mm will be a normal eye view. Because of that, the wide angle of 28 mm will be about half of normal or twice as far away as what you see. Hence a 28-80mm will yield a zoom factor of approx 3 times, but in actuality the effective telephoto increase (magnification) will be only 1.5:1 over what you normally see..........
I hope this isn't too confusing, but I know there are many folks out there who get taken in by total zoom factor and not the total increase of magnifcation over normal viewing. 8-)