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- To avoid focus changes with temperature, which are hard to accommodate without manual refocus, change to camera-controlled Canon lens. Canon EF 100-400mm lens allows for variable-FOV measurement too. We'll need to increase light level.
- Make mount for camera more robust. Use two flat plates clamped onto square rail, and robust tip-tilt mount head
- Need to upgrade software to take daytime focus images with 'manual' control of focus through g-photo2.
- perhaps add more sources, farther apart, and use shorter focal length settings
- replace batteries in wireless flash control with AC adapter units.