Archives for 2015

I’ve been reporting on the results of testing sharpness, as measured by MTF50 results from slanted-edge testing with the Otus 55/1.4 on the Nikon D810 and the Sony alpha 7R (a7R). For the last few days, I’ve posted nothing. That hasn’t been because I’ve stopped working. It’s been because I haven’t been able to produce… [Read More]

We saw in the preceding post that, once we deep-sixed Lightroom’s capricious sharpening, the a7R and the D810 offered similar resolution (as measured by MTF50) in one direction and that the D810 did somewhat better in the other, when the target was illuminated with electronic flash, and we used trailing curtain synch on the a7R… [Read More]

I scratched my head about yesterday’s results, which seemed to show that the Otus 55/1.4 ZF.2 had greater resolution on the Sony alpha 7R (a7R) than on the Nikon 810. from the comments, some of you were just as confused as I.  One of you nailed the problem, which was developing the images in Lightroom… [Read More]

[Warning: the data presented in this post is highly misleading because of he way that Lightroom sharpens during raw development, For a truer picture, read the next post.] There have been discussions on the ‘net recently about the proposition — considered proven by some — that the resolution of the Nikon D810 is superior to… [Read More]

This is a continuation of the real-world, informal testing of the Sony/Zeiss 55mm f/1.8 Sonnar FE (Zony 55) and the Zeiss 55mm f/1.4 Otus ZF.2 lenses on the Sony alpha 7R (a7R) and Nikon D810 cameras. In this post, I’ll present corner captures at various apertures from the Otus on the D810 and the Zony… [Read More]