I have previously reported that the Sony a7RII performs low-pass spatial filtering on raw files under some conditions: bulb and high-ISO exposures. This behavior is now often called the “star-eater” algorithm, a reference to its degradation of some astro images.  Recently, an astrophotographer posted some images here, and claimed that the star-eating behavior affected timed exposures… [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. Sometimes with the slit scan images that I’m doing, the pattern of cloud shadows on the hills changes very rapidly, creating vertical striping patterns that are visually odd (in a bad… [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. Because using a raw workflow is too cumbersome with tens of thousands of images per setup, I’ve been using Adobe RGB JPEG images. There’s an issue with those if you push… [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. This morning I saw a set of images that had been processed overnight, and I got pretty excited. What makes these image so different from yesterday’s? I think it the presence… [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’m beginning to get some images I like from the current slit scan series. I am experimenting with running the synthetic slit from right to left as well as the other… [Read More]