This is the 43rd in a series of posts on the Hasselblad X2D 100C camera and the XCD lenses. You will be able to find all the posts in this series by looking at the righthand column on this page and finding the Category “X2D”. Some casual shooting with the new 90/2.5 XCD lens left… [Read More]
Hasselblad XCD 90/2.5 V lens on X2D
It’s taken almost a year to write this review. I received a review copy of the Hasselblad XCD 90 mm f/2.5 V lens in January. I performed most of my evaluations in the spring of last year. And then I waited for the lens to ship so that I could publish my thoughts. And waited…. [Read More]
Why Foveon images are so noisy
While I was looking at the Sigma DP1 Merrill Studio Scene raw file, I decided to look at some raw histograms. This is the histogram of the whole image: It’s a 12-bit analog to digital converter (ADC). The putative blue channel (what I call the white channel in a Foveon sensor) has about 50,000 pixels… [Read More]
More on Foveon image processing
I’ve never owned a Foveon camera, but I’ve owned many cameras that could capture 3 color channels at each pixel location. The cameras I’ve owned don’t produce images that look like a lot of Foveon camera images I’ve seen. I’ve been curious as to why, and have reported in this blog on some of the… [Read More]
Sample variation in the Fujifilm GF 100-200 at 200mm, revisited
A reader chided me for not using the same methodology when testing my copy of the Fujifilm GF 100-200 and another reader’s copy. To review, I tested my copy with a very complicated program that analyzes stacks of focus bracketed images, white balances the raw MTF curves, fits curves to critical measures, and calculates metrics… [Read More]
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