In the previous post, I put the 20 mm f/1.8 Nikkor S on a Z7, aimed it at an artificial star, and used the focus shift shooting (FSS) feature of the camera with a step size of 1 to move from front-focused to approximately in focus to back focused, and I composited them. In this… [Read More]
Archives for 2020
Nikon 20 mm f/1.8 through-focus behavior
As I said in the previous post, there are two pieces to bokeh. The first is what things look like when they are well out of focus (OOF), and the second is how the transition from OOF to in-focus happens. Yesterday’s post addressed the first; this one will deal with the second. I used a… [Read More]
Sony, Nikon 20mm f/1.8 OOF bokeh on a7RIV, Z7
There are two pieces to bokeh. The first is what things look like when they are well out of focus (OOF), and the second is how the transition from OOF to in-focus happens. The second is complicated, but the first is very simple. What you see when part of the image is well OOF is… [Read More]
Nikon, Sony 20/1.8 foliage test
This is a continuation of my testing of the two new 20 mm f/1.8 lenses from Sony and Nikon. These fit E-mount and Z-mount cameras respectively, and are part of a push by Nikon for a big place in the full frame mirrorless camera (MILC) market, and a defense by Sony of its historical dominance… [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]
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