Whenever you take photos of animals in the wild, you should be respectful of their space and avoid impacting their habitat.įor bird photography, we generally recommend lenses that reach 600mm or more. You need more zoom for this type of photography than most others. This means that you can multiply the focal length of lenses used on that camera by 2 to get the full-frame equivalent, so the Olympus camera’s 12–40mm zoom lens produces the same perspective as a 24–80mm zoom on a full-frame camera.ĪPS-C sensors, like the one used in our upgrade pick mirrorless camera, are in-between Four Thirds and full-frame with a crop factor of 1.5, so Fujifilm’s 16–80mm kit lens would be like a 24–120mm. This difference in size between a given sensor and a full-frame sensor is what’s known as its crop factor.įor example, the Four Thirds sensor used in our favorite mirrorless camera has a crop factor of 2. A smaller sensor effectively crops the image produced by a lens, bringing the subject closer. But digital cameras have sensors of various other sizes, and most are smaller than full-frame. What is crop factor? In general, people talk about focal lengths in relation to full-frame sensors, which are the same size as 35mm film.
If your lens is 24mm (or equivalent) on the wide end, a 5x zoom would mean it’s 120mm on the long end. This is usually expressed as 5x, 10x, 30x, and so on. What is zoom? For a zoom lens (that is, one that can change focal length by rotating the barrel), the difference between the minimum and maximum focal length is what determines its zoom ratio.
The higher the number, the closer the subject appears. The lower the focal length number, the wider of a view you see. What is focal length? Expressed in millimeters, focal length is what determines the perspective of your camera lens. What to know about focal length, zoom, crop factor, and more Here’s a quick overview of what focal length is, how it relates to zoom, and what focal lengths are best for shooting a few kinds of subjects including wildlife, sports, travel, and architecture.
Whether you’re shopping for a new camera or just want a new lens for a body you already own, you should be thinking about how much zoom (or, more accurately, which focal lengths) you need for the subjects you want to capture.
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