Quote (Powned @ Thu, Jul 2 2009, 12:49am)
That is the size of the aperture, usually represented by an F then usually a range of numbers. Like on your first lens, f/4 - 5.6. The lower the number, the bigger the aperture, the more light gets into the lens, the easier it is to take pictures in darker settings and at higher shutter speeds, etc.. Your camera might be different from mine, but on mine an aperture of about 5.6 is great for outdoors, but when its cloudy out it has some issues, i usually have to take the shutter speed down to the 1/20 - 1/160 range depending on what I'm taking a photo of. Your Kit lens might actually be the same aperture as that first one, so you could test it out and see what different lighting will do for your images.
This is one of the reasons that you might see a 55 - 200mm that is $200 and another one that appears the same but is more like $2000. The lower that number the more it will cost, usually, and fixed apertures are also expensive on a zoom lens.
But that might not all be correct, it's just what I think I know.
This post was edited by kratos on Jul 2 2009 05:36am