06 Aug The problem of shooting tiny sculptures on the road
The Subjects: Tiny Boxwood Sculptures
I travelled with the AGO to Europe to shoot medieval boxwood sculptures in 2015. Over the course of three trips, we visited museums in Amsterdam, Antwerp, London, Paris and Salzburg, shooting dozens of artifacts along the way. Prior to the trip we discussed the logistics of doing overhead shots while on the road with limited access to equipment.
The Solution: A Custom Rig
We were about to embark on several trips to Europe so we started to brainstorm custom solutions. The project required top-down photography, which normally requires an enormous stand or a special tripod, the latter of which is awkward to operate and yields inconsistent results. What we would build needed to be really solid; each image required multiple exposures so we did not want the rig moving, even by the smallest amount. The rig also had to be really light, as we would be checking it with the airline and it needed to fit within baggage restrictions and be portable. So the requirements for the custom rig were that it be easy to use, portable, and light.
We settled on making the column out of aluminum extrusion, as it was easy to work with and light-weight. I designed the prototype in SketchUp.
The Raison d’Etre for the Custom Rig: Focus Stacking
With depth of field, the camera can only get so much of an object in focus at one time.
This effect is even more apparent on small objects; the smaller the object is, the less you can get into focus at once. As a result, we needed to use specialized techniques in order to have an image of a small object like a prayer bead where everything is in focus. The solution was to use focus stacking, essentially, to make a series of individual images that are combined to make a composite image where the entire object is in focus.
The resulting high resolution images were used for the Small Wonders exhibition and book.
Photography by Ian Lefebvre © AGO