Sigma 24mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Pentax and Samsung DSLR Cameras
Sigma 24mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Pentax and Samsung DSLR Cameras
This powerful wide-angle lens has everything that needs a fixed focal length, to compete with the powerful zoom lenses to be: a large angle while outstanding intensity, an extremely short minimum distance to the subject, a significant magnification of 1:2.7 and an excellent image quality .As DG lens, it is an ideal addition to your DSLR. In practice, the straight guide and the dual-focus mechanism of the equipment and handling of travel and landscape lens, round off.
The MTF (modulation transfer function is) is one of the methods of measurement by which the performance of a lens and its contrasting behavior can be determined at different spatial frequencies. The horizontal axis expresses the distance in millimeters from the center to the edge of the image, the vertical axis expresses the contrast value (highest value is 1)