https://pho.tography.org/tags/sunstar/ Recent content in sunstar on pho.tography.org Hugo -- gohugo.io en-us Sun, 03 May 2026 00:00:00 +0000 https://pho.tography.org/sunstars-at-f/16-rf-14-35mm-f/4l-is-usm/ Sun, 03 May 2026 00:00:00 +0000 https://pho.tography.org/sunstars-at-f/16-rf-14-35mm-f/4l-is-usm/ A sunstar is not a filter effect. It is a diffraction phenomenon produced by the aperture blades of the lens when a point light source — the sun, a street lamp, a bare bulb — is included in the frame. The RF 14-35mm f/4L IS USM produces it cleanly. The technique is to use it intentionally rather than stumble into it. The mechanics: at wide apertures, light bends minimally around the aperture blades.