Archives for 2016

This post is part of a series about some experiments I’m doing combining space and time in slit scan photographs. The series starts here. Now that I’ve got the Matlab parallel processing going, it’s easy to produce lots of different renderings of the same capture set. There’s a downside to that. How to choose between… [Read More]

This post is part of a series about some experiments I’m doing combining space and time in slit scan photographs. The series starts here. When you take a set of 10,000 5200×3500 pixel images and run slit scan simulations against them, there are a lot of options: What image to start with. Which way to… [Read More]

Yesterday, I showed you histograms of raw dark-field images from the Sony a7RII with release 3.30 firmware with ISO’s between 100 and 1600. The red and blue channels looked pretty similar to the FW 1.0 images I made last year. However, the green channels did not. The uncompressed green channels were more ragged, and the… [Read More]

A little over a year ago, I posted dark-field histograms from the Sony a7RII with FW 2.0, which was the first firmware release to support uncompressed raw. Today I’m doing a similar post for FW 3.3. You might want to open up both posts in separate tabs to see the differences. The green histograms are… [Read More]

We have seen here and here that the Sony a7RII running firmware 3.30 spatially filters raw images prior to writing them to the flash card at shutter speeds slower than 3.2 seconds. The camera did similar filtering for bulb exposures in earlier releases. A DPR poster earlier proposed that the algorithm Sony used was the… [Read More]