Many photographers, attempting to postpone a major decision or save money, will buy a lens they believe will give them the results they desire, only to find that the lens does not perform as expected. When budget is a factor (and when isn’t it?), it’s important to select a telephoto lens that best serves your specific purposes. When it comes to sports and wildlife photography, the purposes are often similar—magnify distant subjects, separate the subject from background—but it’s worth understanding a few basic distinguishing features and how they best advance either of these genres before making a lens purchase.
In addition to prime or zoom focal length and aperture, it is important to consider image stabilization, lens dimensions and weight, optical design, and weather sealing, and then balance these features based on your budget and the needs of your practice. Even lenses with the same focal length or range of focal lengths can be different from one another and perhaps not ideal for your discipline. For example, a 70-200mm f/2.8 lens, such as this one from Sony, is an all-arounder that serves sports, wildlife, photojournalism, and many other photo needs. However, there is also the 70-200mm f/4 version, which is a worthy, more affordable, and lighter alternative.
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