And most camera/lens combinations eventually become diffraction limited when stopped down beyond a certain aperture. Generally speaking, depth of field becomes shallower as one shortens the camera-to-subject distance. First author, Samantha Porter, has also produced an excellent three-part video series that goes into extensive, articulate detail on the specialized post-processing that is required of the raw data acquired from such a system. With this setup, I have been further customizing a photogrammetry technique for small archaeological lithics that I initially encountered in the 2016 paper, A Simple Photogrammetry Rig for the Reliable Creation of 3D Artifact Models in the Field: Lithic Examples from the Early Upper Paleolithic Sequence of Les Cottés (France). A Canon 5D III, my current backup camera, sits atop the Manfrotto head and is mated to a Zeiss Milvus 50mm f/1.4 ZE lens. I've attached the macro rail to a Manfrotto 405 3-Way, Geared Pan-and-Tilt Head that I screwed onto a spare tripod that I normally keep behind the seat of my truck. The resulting kit features an inexpensive popup light tent, an old lazy Susan turntable, and a Cognysis 3X Stackshot macro rail package. In addition, I was also able to checkout a small assortment of gear that I thought I would combine with my own resources at home to create a purpose-built photogrammetry rig in the basement. Small object photogrammetry rig Woodshedding in a basementīack in March during our last on-site work week before the COVID-19 shutdown at UConn, I shot and took with me as much useful raw image data as possible from our lab's automated capture system for later photogrammetric post-processing.
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