Voigtlander Ultron 40 mm f/2 SL II Aspherical
10. Focusing
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Owning to the wide working range of the ring, the focusing is very comfortable indeed. The combination of 40 mm and full frame is very understanding when it comes to small setting errors. At the maximum relative aperture the distance scale, set at 5 meters, allows us to enjoy a sharp image in the range from 4.2 to 6.1 meters. Passing to f/5.6 for a change, you increase the depth of field significantly. When the distance scale remains at these 5 meters the depth will stretch from 3.3 to 10.6 meters. Setting the focus at 9 meters we will be able to admire sharp images from 4.6 meter to practically infinity.
By f/8.0 in many situations we won’t have to bother with focusing at all. Setting the ring at 7 meters will guarantee us a contrast image from 3.4 meters to infinity.
One thing is also worth mentioning. Owing to the fact that the contacts allow a communication between the body and the lens during the manual focusing, you can enjoy the active in-focus indicator in the camera viewfinder.
