This is not necessarily a problem if you don’t expect to be shooting with the lens wide open, but the apertures are often very narrow at the long end of the lens, making this type of lens unsuited for wildlife photography. This will be denoted in the lens title as something like ‘f/3-5.6’. Is the aperture constant through the zoom range? Cheaper zoom lens often have a narrower maximum aperture the further out they are zoomed.Whether the speed of the lens matters to you or not will depend on what kind of photography you are interested in, as above. the smaller the number so that f/2.8 is a larger aperture than f/4), then the heavier and larger the lens will be for a given focal length, and also more expensive. Maximum aperture (lens speed): The larger the maximum aperture of a lens (ie. ![]() For general walk around use, then a mid-range zoom with image stabilization will suit you. If you are a wildlife photographer, then you will want a zoom telephoto lens, with the widest aperture possible, often f/2.8.
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