This is the first post in a long series on the subject of lens screening tests. To see links to all the other posts in this series, go to the bottom of this page — below the comments — and you will be able of click on each one in turn. For the past few days,… [Read More]

In the last couple of posts, I looked at the image quality (IQ) effects of Lightroom distortion correction with the Sony 12-24/4 lens on the a7RII, and the Fuji 23/4 lens on the GFX 50S. I found remarkably little in the way of unwanted action. A reader asked me about performing distortion correction in Photoshop… [Read More]

This is part 13 of a test of the Sony 12-24 mm f/4 FE lens. The test starts here.  Yesterday, I showed you some images that indicated that the new Lightroom lens profile for the Sony 12-24/4 worked quite well. Several people have expressed the opinion that correcting distortion in wide rectilinear lenses in post… [Read More]

This is part 12 of a test of the Sony 12-24 mm f/4 FE lens. The test starts here.  I reported here on the distortion in the Sony 12-24 zoom. At the time, there was no lens profile in Lightroom. as of today, there is, so I’ll give you all an update to look at… [Read More]

There has recently been an assertion that turning on Pre AF on Sony alpha cameras wrecks your battery life. I thought I’d check, using an a9, AF-S, Wide Mode, and the Son7 12-24/4 lens. I measured battery draw versus time, first with Pre AF on, and then with it off. Here’s the ‘scope shot: Time… [Read More]