Camera Lenses

Check the mount, sensor coverage and functions supported by the specific combination. Similar-looking lenses can belong to entirely different systems. An adapter may allow physical attachment without preserving every autofocus, stabilization or aperture-control function. If it contains optical elements, it may also change the image. Verify documented limitations for your body and lens, rather than relying on a broad statement of compatibility that does not name either model.

Choose a focal length with your shooting position in mind. Tight interiors require coverage without stepping far back; wildlife may call for making distant subjects fill more of the frame. Sensor size changes the angle of view produced by a given focal length. For close-ups, inspect minimum focus distance and maximum magnification. The word macro alone does not explain how much detail can fill the image. Focus distance is measured from the sensor plane; lighting space depends on the working distance between the front of the lens and the subject.

A zoom changes framing without changing lenses, useful when your position is restricted. A prime usually asks you to move more and may offer a wide aperture in a manageable package. Check whether a zoom's maximum aperture changes toward its longer end. A wide aperture helps in dim light but reduces depth of field; it does not ensure that every face in a group will be sharp at once.

Consider balance on the camera, filter diameter and whether a hood is included. For video, investigate focusing noise and changes in framing during focus adjustments; do not infer these from price. With a used lens, inspect rings, contacts and signs of moisture, and request sample images. Visible dust does not automatically mean a fault will appear in photographs, but that observation cannot replace a proper assessment of the lens's actual condition.