My whole website, including this blog, was out of service from about 10:00 PDT last night until 7:00 this morning. It was my fault. I wasn’t paying attention to the disk storage being used by backups and the site ran up against its disk storage limit. It didn’t fail gracefully; everything just came to a… [Read More]
Designing color profiles for strobe lighting
I haven’t posted in the last few days. That’s not because I was taking time off from photo tech. It’s because I’ve been beavering away on how to measure and design color profiles. I’ve built more than 50 of them, learned a lot, found a few dead ends, and am finally reading to report my… [Read More]
CC24 vs CCSG CIELab values
The last two posts have been about my experiences using the X-Rite CC24 and CCSG targets and X-Rite’s Color Checker Camera Calibration program with both diffuse and direct solar illumination. I found anomalies between the two targets, which I thought might be related to lighting and glare. But today I discovered that, even with the… [Read More]
Fuji 45-100/4 vs 45/2.8, Siemens star
I’ve tested the Fujifilm 45-100 mm f/4 against two other Fuji GFX zooms, the 32-64/4 and the 100-200/5.6. In this post, I’ll be comparing the lens to the Fuji 45/2.8 at f/4, f/5.6 and f/8. I’ll be looking at center and corner sharpness using a 22-inch-diameter low-contrast Siemens star target that I printed for this… [Read More]
Optical low-pass filters and the Fuji GFX 50S and 50R
This is the fifth post on balancing real and fake detail in digital images. The series starts here. In the last post, I looked at what advantages would obtain if the Fuji GFX 100 and the Sony a7RIV had an optical low-pass anti-aliasing filter (OLPF or AA filter). It seems to me that those cameras… [Read More]
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