the last word

I’ve spent much of  the last few days writing computer code for a new project, which like almost all my projects, is an outgrowth of an previous one. When I was working on the frozen flower pictures a few weeks ago, I noticed an interesting mistake. I had been making captures for stacking of some… [Read More]

The day before yesterday, I wrote this post about my decision to step down as moderator of the DPR MF Forum and to step away as a participant in that forum. I took the opportunity to reflect on what I’d like gear fora to be, and some ways in which I think they fall short…. [Read More]

I’ve been a participant in the DPR Medium Format Forum for over two years. I’ve been a mod on that forum for more than a year. I’ve been an MF user since, well, would you believe 1949? I’ve used digital MF cameras since 2002. About two years ago, I sold all my Hasselblad MF gear… [Read More]

This is a continuation of a series of posts about blur management for landscape photography. The series starts here. In the last post, I looked at blur circle profiles that resulted from a mixture of diffraction, pixel aperture, and defocus, and compared those profiles to the blur circle limits that I had derived from approximations. In… [Read More]

This is a continuation of a series of posts about blur management for landscape photography. The series starts here. So far in this series, I’ve been talking about blur circles as if they were disks of constant intensity (digital filter designers call these pillboxes). When we’re talking about combining the blur from diffraction, defocus, and the… [Read More]