It’s natural to compare the new-kid-on-the-block Sony 20mm f/1.8 to the excellent Zeiss Loxia 21 mm f/2.8. Here’s a test with both lenses mounted on an a7RIV aimed at a low-contrast Siemens Star at about 8 meters, with the star in the center and the lower left corner. I used AF-S for the Sony, and… [Read More]
Search Results for: sony 20/1.8
Sony 20mm f/1.8 focus curvature
Roger Cicala has come up with a quick and dirty focus curvature test that I’ve used before. Just make a photograph of a flat textured surface at an angle well away from the image field focus plane, then bring it into Photoshop and invoke Filter>Stylize>Find Edges. It works great at long and near-normal focal lengths:… [Read More]
Sony 20mm f/1.8 G initial tests
I just received a copy of the new Sony 20 mm f/1.8 G lens. I’ve ordered the similar Nikkor S. I’ll be testing both of them, separately and together. FOr those of you who’ve been following the color profiling work, don’t worry; I’ll be doing both types of testing at the same time. Just don’t… [Read More]
Focus curvature with the 20mm f/1.8 Nikkor S
I used the quick-and dirty focus curvature test (Photoshop > Filter > Stylize > Find Edges) on a picture of my driveway with the 20 mm f/1.8 Nikkor S wide open on a Z7. There is some focus curvature, with the focal plane bending toward the camera as you get further off axis. The Sony… [Read More]
20mm f/1.8 Nikkor S initial testing
It is a rare occurrence that two rival camera manufacturers viewing for the top of one market (in this case full frame MILCs) introduce two lenses of the same focal length and aperture simultaneously. Yet that is what has just happened with the Sony 20 mm f/1.8 G E-mount lens and the Nikon 20mm f/1.8… [Read More]