First Results: Optical Aberrations
With the lens resting in the lens mount, the focus is fixed at about 10 feet. The images are about a half a stop brighter than my Nikkor 50 mm at f/ 1.4 so I don't think it's quite f/ 1.0 but it is measurably faster than f/ 1.4. But the big surprise is low contrast and very large halos around any bright objects. And unlike what you might expect from a lens at about f/ 1.2, there is no thin plane of focus that snaps in. Instead, there seems to be a very broad area from about 7 feet to 14 feet that has nearly the same degree of focus. Of course, the low contrast, halos, and soft focus can all be put to good use as long as you are not looking for the crisp images produced by commercial lenses.