industrial zone plate

industrial zone plate

Another shot taken with the Lensbaby Composer Pro, this time with the zone plate optic.

Unlike a lens, which uses refraction to focus light, a zone plate uses diffraction; it’s basically just a concentric series of light and dark rings that create the image at the focal point via constructive interference.

Zone plates give a soft focus effect with a characteristic glow. They are particularly useful because, in contrast to a pinhole, the equivalent aperture is wide enough to allow for hand-held shots.

long exposure industry

Long exposure industry

This was shot through a 10-stop Formatt-Hitech ProStop IRND Filter. Combined with the inbuilt Ricoh GR 2 stop ND filter this allowed an exposure of a full minute at midday on a bright sunny day. The tops of the trees are visibly blurred by the slight wind. It was post-processed in Lightroom and Nik Silver Efex Pro 2, which took about four hours. Yes, I could have gone all Joel Tjintjelaar on it and spent thirty hours in Photoshop making hard selections and luminosity masks… but life is short and there are more photographs to take.