The Detector objects are unable to find the Camera wherein they dwell, meaning that e.g. ccd.transform(pos, camGeom.PIXELS, camGeom.FIELD_ANGLE) is impossible (you need a camera), and the functionality requested in
DM-14932 cannot be implemented given only a Detector.
Please add e.g. detector.getCamera() to the Detector API. This may require moving Camera back into C++.