In yesterday’s post, I used photographs of an oscilloscope screen to conclude that the Sony a7R/Zeiss 100mm f/2 Makro-Planar ZF/Novoflex F to E mount adapter/Novoflex adapter collar/Arca Swiss Monoball/Gitzo GT3541XLS combination produced 2 or 3 camera pixels peak-to-peak vibration with the camera oriented in portrait position. The day before yesterday, I performed testing of the… [Read More]
Search Results for: sony raw compression
Shutter slap testing with ISO 12233, part 5
I wanted to see what the Sony a7R shutter slap looked like with a longer lens, and what happened when the camera is in portrait orientation. I chose the Zeiss 100mm f/2 Makro Planar ZF and fitted it to the camera with the Novoflex Nikon-lens-to-E-mount adapter. I attached the Novoflex rotating tripod collar to the… [Read More]
Combed histograms
I started a thread on Luminous Landscape about computing unity gain ISO from a single exposure, and it’s gotten pretty interesting. There have been useful discussions about what good knowing the Unity Gain ISO is in picture-making. One of the discussion led me to make some test images and look closely at their histograms. In… [Read More]
A tale of two cameras, part 1
It was the best of times, it was the worst of times, it was the spring of digital, it was the autumn of film, it was the end of toxic chemicals, it was the beginning of poisonous third-world recycling, it was the age of a cornucopia of new devices and processes, it was the age… [Read More]
Image processing for in-camera histograms
There are several steps in getting to the JPEG preview image in a raw file. All of them except the last step, compression, apply to the in-camera histogram. For the purpose of this paper, I’ll assume that the compression/reconstruction process is lossless. It is not, but the lossy nature of the process does not affect… [Read More]
- « Previous Page
- 1
- …
- 6
- 7
- 8
- 9
- Next Page »