From some research it appears the V2 was optimized for f/1.4 at the cost of stopped down performance in the corners compared to V1. V1 should have weaker performance at f/1.4, but better performance in the corners stopped down. Optimized at f/1.4 at infinity not close distance. If you have the time or desire, then it would be interesting to see how V1 compares against V2 (or V3 as they should be the same optically), at infinity in the corners at let's say f/5.6 or f/4. The V2/V3 should have very good to excellent performance in the corners by f/8 so no need to test there. Just at that one or two aperture settings should reveal everything.
Another interesting piece of information that I dug up is that the lens elements are UV transparent on the Summarit so it needs a UV filter for film. It shouldn't need a UV filter on digital, but I wonder if you put a UV filter on the lens if performance would change. This could be a very interesting lens for modified sensors for IR photography.
It appears you are correct. v1 appears sharper in the corners stopped down. Focus is on the dormer window on the far away house.
From some research it appears the V2 was optimized for f/1.4 at the cost of stopped down performance in the corners compared to V1. V1 should have weaker performance at f/1.4, but better performance in the corners stopped down. Optimized at f/1.4 at infinity not close distance. If you have the time or desire, then it would be interesting to see how V1 compares against V2 (or V3 as they should be the same optically), at infinity in the corners at let's say f/5.6 or f/4. The V2/V3 should have very good to excellent performance in the corners by f/8 so no need to test there. Just at that one or two aperture settings should reveal everything.
Another interesting piece of information that I dug up is that the lens elements are UV transparent on the Summarit so it needs a UV filter for film. It shouldn't need a UV filter on digital, but I wonder if you put a UV filter on the lens if performance would change. This could be a very interesting lens for modified sensors for IR photography.
It appears you are correct. v1 appears sharper in the corners stopped down.
Jun 16, 2023 at 01:33 PM
Previous versions of lifeandmylens's message #16272097 « Leica 50mm f/1.4 Summilux (pre asph) - v1, v2 & v3 »
