Allow to specify cameras.json as a priori estimate instead being fixed

opendm/osfm.py

@@ -235,7 +235,7 @@ class OSFMContext:
                 "matching_gps_neighbors: %s" % matcher_neighbors,
                 "matching_gps_distance: 0",
                 "matching_graph_rounds: %s" % matcher_graph_rounds,
-                "optimize_camera_parameters: %s" % ('no' if args.use_fixed_camera_params or args.cameras else 'yes'),
+                "optimize_camera_parameters: %s" % ('no' if args.use_fixed_camera_params else 'yes'),
                 "reconstruction_algorithm: %s" % (args.sfm_algorithm),
                 "undistorted_image_format: tif",
                 "bundle_outlier_filtering_type: AUTO",