Archives for July 8, 2017

This is part 8 of a test of the Sony 12-24 mm f/4 FE lens. The test starts here. A couple of  TLAs (three-letter acronyms) up there, huh? OOF you probably know; it stands for out of focus. PSF means point spread function, and is a bit more obscure. It’s what the camera does with… [Read More]

This is part 7 of a test of the Sony 12-24 mm f/4 FE lens. The test starts here. Now we’ll look at a different kind of flare. Wide open at 12 mm: There si some flare here: it’s that string of small reflections of the sun running inward fro the real sun towards the… [Read More]

This is part 6 of a test of the Sony 12-24 mm f/4 FE lens. The test starts here. In order to start to get a handle on the Sony UWA zoom’s flare, I set up on one of my usual test scenes, seen here wide open at 12 mm, 18 mm. and 24 mm…. [Read More]

This is part 5 of a test of the Sony 12-24 mm f/4 FE lens. The test starts here. I’ve been asked to compare the Sony 12-24 to the Zeiss Batis 18 mm f/2.8 and the Leica 16-18-21 mm f/4 Tri-Elmar. I aim to please, and here’s a visual look at all three. I set… [Read More]

This is part 4 of a test of the Sony 12-24 mm f/4 FE lens. The test starts here. There have been reports of corner color casting with the Sony 12-24 mm f/4 lens on the Sony a7RII. I thought I’d check.  Corner color casting is usually caused by color filter array (CFA) crosstalk, a phenomenon… [Read More]