What Is Conversion Of Slr Zoom To Point-and-shoot? Posted 19
April 2004 - 08:47 PM With my Canon G5, G2 before that and my
first digital camera, the Kodak DC280, they all spoke of nX zoom
rating. Either it was 2x, 3x or 4x. I've seen Sony's as high as
10x. This I understand but when I get into the SLR lenses, they
don't use this rating. They use metric measurements. Which is
fine, but I'm confused because when I went to Nikon's web site,
it stated the ED lens I just bought, 70-300mm is 4.3x. Well,
found an article on DPReview.com that has a review on the new
forthcoming 18-70mm DX lens and it states it is 4.3x. So how can
the telephoto be the same as a mid-range? I'm totally confused.
Is there a "chart" some where to explain this to those of us
that have grown up in the digital focal range world? Posted 20
April 2004 - 02:50 PM The zoom factor or magnitude is calculated
the same way on all zoom: you take the highest focal lenght and
you divide it by the lowest. So, in your examples, a 70-300 is a
300/70 = 4.2