I'm new to taking star trails, and fairly new to photography in general. After my first attempt at taking a star trail, I composited them in Photoshop and when I merged the layers I got this pattern ...
What is the image defect called "moiré"? What causes it, and how can we avoid or reduce it? Is it related to "false color"?
I was just looking at a highrise building whose windows had a horizontal grill in front of them. There were several clothes drying in these windows and the sun was casting shadows on the cloth. The ...
What is the most reliable way to trigger moire artifacts in an image straight out of a digital camera? I know that resizing an image can cause it but I want to see it all full-resolution and be able ...