Archives for February 2016

I’m taking a break from the medium tele testing to run down an AF anomaly I stumbled onto with the Batis 85/1.8 on the Sony a7RII. That lens has considerable longitudinal chromatic aberration (LoCA), and, when the camera is in autofocus (AF) mode, it focuses systematically in the wrong place, on the side of the… [Read More]

This is a continuation of a test of the following lenses on the Sony a7RII: Zeiss 85mm f/1.8 Batis. Zeiss 85mm f/1.4 Otus. Leica 90mm f/2 Apo Summicron-M ASPH. AF-S Nikkor 85mm f/1.4 G. Sony 90mm f/2.8 FE Macro. The test starts here. Horshack, a poster on DPR whose opinions and methods I respect, said… [Read More]

This is a continuation of a test of the following lenses on the Sony a7RII: Zeiss 85mm f/1.8 Batis. Zeiss 85mm f/1.4 Otus. Leica 90mm f/2 Apo Summicron-M ASPH. AF-S Nikkor 85mm f/1.4 G. Sony 90mm f/2.8 FE Macro. The test starts here. Yesterday I reported on the curious behavior of the Batis 85/1.8 on… [Read More]

This is a continuation of a test of the following lenses on the Sony a7RII: Zeiss 85mm f/1.8 Batis. Zeiss 85mm f/1.4 Otus. Leica 90mm f/2 Apo Summicron-M ASPH. AF-S Nikkor 85mm f/1.4 G. Sony 90mm f/2.8 FE Macro. The test starts here. I lit a slanted-edge target with two Westcott LED panels, and set… [Read More]

[Edit: when I first posted this, I thought you could turn off PDAF for native lenses with the a7RII. Turns out you can’t.; what I thought turned it off only turns off the display of the PDAF point. So this test is basically the same as the one in the next post. I’m leaving it… [Read More]