My Camera > Lenses47Lens markingsFind out what the numbers on the lens signify.SAMSUNG 18-200 mm F3.5-6.3 ED OIS lens (example)1 2 3 4 5No. Description1Aperture valueA range of supported aperture values. For example, 1:3.5–6.3 meansthe maximum aperture value range from 3.5 to 6.3.2Focal lengthThe distance from the middle of the lens to its focal point (inmillimeters). This figure is expressed in a range: minimum focal lengthto maximum focal length of the lens.Longer focal lengths result in narrower angles of view and the subjectis magnified. Shorter focal lengths result in wider angles of view.3EDED stands for Extra-low Dispersion. Extra-low dispersion glass iseffective in minimizing chromatic aberration (a distortion that occurswhen a lens fails to focus all colors to the same convergence point).4OIS (p. 89)Optical Image Stabilization. Lenses with this feature can detectcamera shake and effectively cancel out the movement inside thecamera.5ØThe lens diameter. When you attach a filter to the lens, make sure thatthe diameters of the lens and the filter are the same.
