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]
Archives for February 2020
Optical low-pass filters and high-resolution cameras
This is the fourth post on balancing real and fake detail in digital images. The series starts here. A reader asked me to look into the effects of optical low-pass filters (OLPFs) on sub-Nyquist sharpness and aliasing. It was an interesting exercise for me, and I hope you’ll be interested in the results. Such filters… [Read More]
No D6 review in the works
I’ve received some queries about a future Nikon D6 review. I thought hard about doing one, and I’ve decided to take a pass on the D6. The improvements over the D5 seem modest at best, and I’m not particularly interested in the AF improvements, which are probably the most significant ones in the new camera…. [Read More]
Does pixel-shift increase resolution?
The a7RIV has 16-shot pixel shift technology. Fuji has said that they will be bringing that capability to the GFX 100 in a future firmware update. These events have rekindled the fires of discussion of that fifteen-or twenty-year-old scheme, specifically about how much the resolution of the system is increased. I am about to wax… [Read More]
Nikon 500/5.6 PF, 180-400/4 on Z7, revisited
Here’s another try at an informal test of the Nikon 500mm f/5.6 phase Fresnel lens compared to the Nikon 180-400mm f/4 zoom. Here’s the scene with both lenses, with the zoom set to 500mm by switching in the built in teleconverter and setting the lens to 360 mm.. I made the shots at sunrise to… [Read More]