A few years ago, with help from Jack Hogan, I wrote a Matlab program that, given a set of color filter array spectra (to be technical, the spectra of the camera’s response to light passing through each of three color filters), would find the optimum compromise matrix for the Macbeth 24-patch Color Checker (CC24) and… [Read More]
GFX 100 II, X2D auto-focusing with dark EVFs
In a previous post, I compared the autofocus performance of the FujiFilm GFX 100 II with the GF 110 mm f/2 lens to that of the Hasselblad X2D with the XCD 90V lens when shooting family portraits, and found that the X2D autofocus failed to achieve focus in situations that the GFX 100 II handled… [Read More]
Family photography with the X2D/XCD90V and the GFX 100 II/GF110
I reported a year or so ago that I’d had trouble with the autofocus on the Hasselblad X2D-100C at family gatherings. That was using the XCD 38V lens. This year, I spent two days making those kinds of images with the X2D and the XCD 90mm f/2.5 V lens. Then I spent two more days… [Read More]
GFX 100 II pixel shift
I got a complicated question that may interest others, so I’m going to answer it here. If it’s on your radar, I’d be interested to know if the GFX100ii pixel shift is improved at all from the GFX100s. It appears to be the same to me, except for the 4-shot mode. I use it on… [Read More]
Foveon Merrill color accuracy, continued
Yesterday I published a post that took a set of Sigma Foveon silicon spectral responses and a hot mirror spectral transmission spectrum, calculated an optimal compromise matrix, and evaluated the color accuracy of the camera using the Macbeth CC24 patch set for both training and evaluation. A reader questioned the accuracy of the curves supplied… [Read More]
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