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| p.4 #9 · Carl Zeiss Apo Sonnar T* 2/135 |
The new 135 seems very interesting. Compared to the Sony lens it's much better controlled over the image height, and a lot sharper at wide open. Note how close the sagittal and meridonal lines follow each other, indicating very low astigmatism and very low amounts of coma, even at F2.0. The placement of the ED elements would also suggest a very well controlled LoCA, something that is hinted at in the (admittedly) very lacking sample images... :-)
These MTF's are not from the same K-8 MTF machine, but at least they're very similarly configured. I don't have F4.0 measurements of the SAL135, so we're comparing F4.0 to F8.0 in the second measurement. These are just the 20lp/mm data, the chart gets rather unreadable when I overlay all three datasets
But you are comparing ZA at f1.8 to 135/2 at f2.
Not a fair comparison.
Do you have the 40lp graphs?