The Pep Ventosa ‘in-the- round’ technique requires that a number of images be taken around a central subject. The subject thus remains recognizable as images are blended , with other elements becoming increasingly less discernable.
This focus on the central element led me to wonder. What if instead of rotating around the subject I instead took several images at different focal lengths, each one keeping the subject consistent within the frame (both in position and size).
Following is a quick test of that theory. This is the result of 7 images, moving forward with each change in focal length to maintain a consistent subject position and size.
This produces an interesting and pronounced effect, especially on the background. I suspect the camera was pointing up slightly, hence the effect is more dramatic toward the upper edge.
I think this may have a certain advantage over the ‘in-the-round’ technique in cases where you can’t shoot around a subject, or where detail needs to be preserved on one side (eg statues, non-cylindrical subjects, or any subject that has a ‘preferred’ side).
This is perhaps not the best example of the process, but I think it does enough to justify further experimentation.
I’d be interested to hear if anyone else has tried this technique and if possible see the results.