Instrument criteria are presented for the Low-Q Diffractometer (LOD) at the LOS Alamos Neutron Scattering Center (LANSCE), and a design is shown to meet these criteria. The collimator consists of q ultiple-aperture pinhole platea, qnd incorporates "dynamic gravity focusing" to center all wavelengths on the detector. Preliminary test results, making use of the Proton Storage Ring, a liquid hydrogen u operator, and tvo different position-sensitive detectors are shown.