rscheffler wrote:
...It seems to explain why when I tested my ZM21 f/2.8 on the 5N the optical performance into the corners was quite poor at wider apertures. This brings me back to the GXR again with its AA-less sensor and the recollection that Mitch posted a number of Leica Elmarit 21mm images (which seems to have a similar optical design to the Zeiss) earlier in this thread and never complained about poor corner performance...
If the ZM21/2.8 has a symmetrical design, then the Elmarit-28 ASPH is not at all similar in optical design, since it has a rertrofocus design.
