This is part of a series about developing a quick qualitative lens tilt test. The series starts here. I thought more about the target for the lens tilt test, and realized that I had the wrong one. The target that I was using was optimized to give large amounts of image contrast over a range… [Read More]

In this thread on DPR, the original poster reported some creative and useful work on quantitatively measuring filed flatness and tilt. During the discussion, he made reference in passing to using the focus peaking feature of some mirrorless cameras to rapidly check for lens tilt.  I was intrigued. In the past, I had some success… [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. I am experimeenting with the slit scan technique with different weather conditions.  

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. Yesterday, I showed a bunch of renderings of the same image sequence using a vertical synthetic slit.  I’ve set up the program to simulate a horizontal slit, and here are some… [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. 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]