Iliah Borg has pointed out that he does his UniWP calibration in a monitor space with native primaries and a gamma of one. Not using the native primaries might be one source of inter-channel crosstalk. To find out if this is significant on my NEC PA301W monitor with the D800E, I made three exposures at… [Read More]
Testing for ETTR, part 21
Now we have two methods for UniWB that work just fine. One, the gridded search, requires only Rawdigger and Photoshop, and doesn’t make the user do any math beyond adding and subtracting integers. Newton’s method comes in two flavors. The simple monitor space approach takes a while to converge, but works well. The matrix-based camera… [Read More]
Testing for ETTR, part 20
In a private communication, Iliah Borg, one of the early proponents of, and an expert on, UniWB wrote to me: “Suppose you are displaying some grey on your monitor, shoot it …and white-balance the shot. Now if in linear space you multiply the R and B by the resulting custom WB coeffs you should have… [Read More]
Testing for ETTR, part 19
I’ve figured out why I couldn’t get either the D4 or the D800E to white balance to the screen shots. It was pure cockpit error on my part. I misread the manuals for both cameras, which are virtually identical with respect to white balancing. I thought you could get the camera to compute and store… [Read More]
Matboard for Exhibition Fiber
I’m starting to print for the In Motion exhibition which opens at the Center for Photographic Art in March. I usually print the images from the Staccato series on Epson Exhibition Fiber paper. I’ve been looking for matboard that matches the paper for more than a year without success; everything I’ve tried has looked yellow… [Read More]
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