Archives for 2025

A group of simulated lens aberrations with the same strength as in the previous three posts, with yet another subject.                  

Here are the aberrations in the same strength as in the last post applied to a different base image.                

In the last post, I showed you the result of several common lens aberrations taken one at a time. In this post, I’ll do the same for a photographic image. See the previous post for explanation and definitions.              

I’ve written a program to simulate lens aberrations, singly and in combination. For some of the limitations of the program, see the preceding post on this blog. In this post, I’ll use a grid of sinusoidal Siemens stars as the target. Later on, I’ll show results on real-world images. This post presents the main aberrations… [Read More]

For the past couple of weeks, I’ve been working on a simulator to assist in visualizing the effects of lens aberrations. In the interest of computing speed and programming effort, I’ve had to make a lot of compromises, but I hope it will be useful. I’ll be presenting results soon, but first I’d like to… [Read More]