The lens makes, plastic or not, externally and mechanically a high-quality impression. The focus ring can be fixed to and move with precision. Autofocus has in the short design Although no long distances to cover, but works remarkably quietly and accurately.
It can be easily used even old 77mm filters and polarizing filters with higher margin without leading to vignetting in the image field.
The lens is quite outstanding perspective corrected. Pincushion and barrel distortion are minimized.
Of course, the vignetting at f 1.8 does not fall clearly for me but seriously disturbing. Even slight dimming enhances the value considerably.
The / 20 1.8 has all the visor an astonishingly high image quality, even if the figure at f 1.8 is naturally a bit softer.
Terrific for this wide range of maximum magnification ratio of 1: 4.3, which makes it possible to put objects in the foreground scene great in great background.
When recording an image above the distance between the nose of the Guan Yin figure and the attached filter about 6 cm. The other two images are photographed from close. The photos are at f 5.6; 1.8 and 9 received.
All around, in my view a highly recommended lens for full frame cameras with 24 and more MP and for all those who like to work on a high quality level variable with a wide angle.
