When you first learned about photography, right along with the Sunny Sixteen rule, I’ll bet you learned this one: When shooting hand held, set the shutter speed to at least as fast as one over the focal length of the lens. That rule was originally promulgated for 35mm cameras. Should you scale the shutter speed… [Read More]
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Yesterday’s oak tree images
Here are a few images from yesterday. The top one is my favorite. I like the rectilinear mapping. It’s not often I can use it because my usual total stitched image field is too wide. Maybe I’ll experiment with a longer lens — these were all with a 60 — to narrow the field of… [Read More]
Learning on the job
No Battle Plan Survives Contact With the Enemy Thus spoke German military strategist Helmuth von Moltk. He was apparently right about war. The obvious corollary certainly applies to photography. And thus it is with my infrared trees series. Let’s start with lenses. I started out with the LifePixel-modified Sony alpha 7, the Coastal Optical 60mm f/4,… [Read More]
Does pushing in Lr affect white balance?
I took the data from the preceding post, and analyzed the chromaticity errors, which I defined at the square root of the sum of the difference between the a* and b* values of the unpushed and the pushed image. Here’s what I got, plotted, as before, against, the luminance of the test patches: Except for… [Read More]
ETTR — just crank up the ISO? Part 8
Here are the SNR graphs from yesterday, but for the D800E instead of the D4. There is even less reason to increase the ISO to improve the SNR of midtone and brighter values than there is on the D4. Note how low the statistical variation is compared to the D4. Why? I don’t know. Should… [Read More]
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