This is a continuation of the Loxia review that starts here. I took a walk this morning with my new lens on the a7RII. Here’s a distortion test, first with Lightroom’s lens corrections turned off: There’s just a little mustache distortion. With lens correction on: The distortion pretty much goes away. Here’s an image with… [Read More]
Zeiss Loxia 21mm f/2.8, part 1
On Wednesday, the big brown truck brought a Zeiss Loxia 21mm f/2.8 lens for the Sony alpha 7x cameras that I’d ordered on announcement day back in October. I tore into the package like it was Christmas. No pouch, which is OK with me, since I use the Domke wraps or climbing chalk bags, and… [Read More]
Macbeth CC, Illuminants, & output color spaces
This is the eighteenth in a series of posts on color reproduction. The series starts here. You don’t have to read the whole thing if you don’t want to. I’ll try to make this post reasonably self-contained. If you get confused, reading the series from the beginning may be useful. Warning. This post assumes a… [Read More]
Macbeth whitepoint adjustment errors — more illuminants
This is the seventeenth in a series of posts on color reproduction. The series starts here. You don’t have to read the whole thing to make sense of this post, but it will probably help if you read yesterday’s post. Today, I’m going to explore white point conversion errors with perfect (simulated) cameras and raw… [Read More]
Macbeth white point adjustment errors
This is the sixteenth in a series of posts on color reproduction. The series starts here. I’ve spent the last few days coding up a storm so that I can automate the color error calculations involved in analyzing Macbeth color checker charts converted by various cameras, raw developers, and camera profiles. I needed to test… [Read More]
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