This is a quick test of Zeiss ZM 35mm f1.4 versus Leica 35mm 1.4 Fle. I used PCX 5m for both lenses. Some caveats should be mentioned here. Firstly, I didn't use tripod and didn't have lot of time to check the precision of focuses as my friends were pretty hungry. Secondly, the alignment of PCX glass may not be perfect as I am still waiting for the Silicone O-ring to center the glass in its holder. Nevertheless, the results of this test seem to be obvious to me. I would not hesitate using these two excellent lenses on distant landscape and stopping down to very slow apertures is not necessary unless one wants more DoF. Before the test I thought that the Zeiss Distagon would smoke the Leica Summilux all over. But it seems that the Leica is putting up a good fight to the last pixel. Differences seem to be small in most areas and probably not going to affect me much in the real world situations but I'm not a landscape shooter kind of guy and this conclusion may not hold for meticulous shooters here.
Below is the whole scene and red marks are cropped spots.
The first images are always from Zeiss ZM 35/1.4 and the second images are from Leica 35mm Summilux FLE. All were taken with A7RM2 and the lenses were set at F4 with front end filter (PCX 5m). You can compare these images at 100% by using links to my Flickr pages.
