We continue on with the testing that was begun in Part I of this series.
This was shot at f/4 and 1/250 at about 4 meters. The focus was on the closest cluster of berries on the tree, just to the left of the center of the frame. Forgive the fogging on the upper right of each shot. This is an artifact of me carelessly changing lenses in bright light – there is a light path around the shutter curtains that causes this in certain circumstances when there is no lens in place.
The FED 50/3.5 shows good sharpness in the center of the frame, but this goes away quickly as you move outward, particularly toward the corners.
The I-26 displays here what proved to be a tendency to overexpose a bit relative to the other lenses in this test, but other than that it is quite similar in this shot to the FED lens shown above. Bokeh is a bit softer, particularly in the far distance.
Unsurprisingly, the damage to the front element of the I-50 produces a low contrast look with some glow around bright areas. Resolution is better than might be expected, but again it declines away from the center.
The six-element Jupiter shows its stuff here; where the center resolution and sharpness are no greater than the others, they are maintained more evenly toward the edges of the frame. The out-of-focus areas have a somewhat different, smoother feel relative to the other lenses. Contrast is generally similar to the FED and I-26.
In the next post in this series, we will see what happens when shooting a high contrast scene at a moderate aperture.