Lens Testing, Round 1
Part 5. Stopped-Down Edge Target
30 Arsat. Looks good even through the compression caused by fisheye distortion.
Coming soon: Hartblei 45mm PCS.
45mm Mir. More contrast than wide open, but not much more resolution.
50mm Flektogon. Again, a disappointment at the edges. The contrast is better, but the same coma tendency visible wide open is here. Camera shake isn't likely--the tendency is the same as with the wide-open exposure.
80mm Arsat. Better than the Volna, and second best overall in this category.
80mm Volna. When they say the Volnas are better than the newer Arsats, they didn't mean this pair.
120mm Vega. An outstanding performer in this category--among the best. Group 3 is resolved every bit as well (and perhaps even a bit better) compared the Arsat normal, and better than the Volna normal.
180mm Sonnar. See the color? Camera shake would not explain color, but something is making this lens worse stopped down. Intentionally undercorrected spherical aberration?
240mm doubled Vega. Oooh, lots of color here. The teleconverter is adding chromatic aberration.
360mm doubled Sonnar. The color and loss of contrast has almost wiped out Group 3, but the lines are still resolved under the microscope.
Here are the rankings for edge performance stopped down:
240 2x Vega
360 2x Sonnar
In the next page, we will discuss the Sonnar issue.