User's Manual Part 1

My Camera > Lenses
49
Lens markings
Find out what the numbers on the lens signify.
SAMSUNG NX-M 9-27 mm F3.5-5.6 ED OIS lens (example)
43
5
1
2
2
No. Description
1
Aperture value
A range of supported aperture values. For example, 1:3.5–5.6 means
the maximum aperture value range from 3.5 to 5.6.
2
Focal length
The distance from the middle of the lens to its focal point (in
millimeters). This gure is expressed in a range: minimum focal length
to maximum focal length of the lens.
Longer focal lengths result in narrower angles of view and the subject
is magnied. Shorter focal lengths result in wider angles of view.
3
ED
ED stands for Extra-low Dispersion. Extra-low dispersion glass is
eective in minimizing chromatic aberration (a distortion that occurs
when a lens fails to focus all colors to the same convergence point).
4
OIS (p. 84)
Optical Image Stabilization. Lenses with this feature can detect
camera shake and eectively cancel out the movement inside the
camera.
5
Ø
The lens diameter. When you attach a lter to the lens, make sure that
the diameters of the lens and the lter are the same.