What Do The Numbers On A Camera Lens Mean

This refers to the focal length of your lens.

It affects the perspective and angle of view of coverage for example a focal length for a 16mm lens will show a much wider frame than a 200mm lens. What do the numbers and letters on your camera lens mean. When you zoom your lens in you re zooming between 18mm and 55mm. That indicates the diameter of the front of your lens or the size of filter required to fit on it.

The first number or pair of numbers indicates the range of available focal lengths in millimeters. So an ordinary basic 18 55 dslr lens can zoom from medium wide views out to the beginning of telephoto range. However your zoom lens because it has that two numbers means you can move the zoom ring to zoom in and zoom out and you can go through that whole range of focal lengths. The next number we are going to look at from the numbers on your lens is the aperture.

To the trained eye one glance at a camera lens can tell you if they dropped 200 on a lens or 2500. What do camera lens numbers mean. Numbers and letters on lenses what does 18 55mm mean. 18mm is wide angle and 55mm is more zoomed.

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The focal length is the functional distance between the front of the lens and its focal plane. Lens speed or maximum aperture will be listed as some number immediately following the letter f. This number series followed by a millimeter expresses the lens s focal length. When comparing lenses the two most important numbers are the focal length range and lens speed.

The maximum aperture number. Also on the end of your lens you may see a funny symbol that looks like a zero with a strike through it then a number. The numbers marks and letters on your lens tell you everything you need to know it s strengths and weaknesses what accessories you need to buy everything. Focal length range will be listed as xx xx before the letters mm e g.

The mm stands for millimeter and this is the distance between your camera s sensor and the point of convergence in the lens.