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 aiming 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]
An apology
My whole website, including this blog, was out of service from about 10:00 PDT last night until 7:00 this morning. It was my fault. I wasn’t paying attention to the disk storage being used by backups and the site ran up against its disk storage limit. It didn’t fail gracefully; everything just came to a… [Read More]
Metabones 1.26x Expander on GFX 100 with Otus 55
Three or four weeks ago I received a Metabones 1.26x expander for Nikon F-mount lenses on Fujifilm G-mount cameras. This is an adapter with glass — and quite a bit of glass, at that — inside. It increases the focal length of any lens attached to it by a factor of 1.26, and expands the… [Read More]
Camera differences in Adobe Color Profile
In the last post, I showed that, at least in the default general-purpose settings, Lumiriver Profile Designer did not do a particularly good job of producing the same color from raw files from three different cameras, even though with the reproduction defaults (except for 2.5 dimension LUTs) it did pretty well with at least one… [Read More]
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