In the field this performance holds with a slight softening of the details at various levels of detail rendition. The reproduction of extremely fine detail shows a small amount of astigmatism. If you have textural details of complicated patterns an overall softness will be the result. In the far corners the very fine detail is still visible, but very soft by now, producing fuzzy details. This level of performance holds till 1 meter and in the macro position, where the distortion is a bit more pronounced.
Corners stay behind.
The performance at 50mm. At full aperture the overall contrast is a bit lower than in the 35 position, no vignetting or distortion. Extremely fine detail has fuzzy edges, but still a high contrast. In the field fine detail is crisply rendered and very fine detail has slightly soft edges, becoming quite fuzzy when the extremely fine details are recorded. In the far corners very fine details just visible.