Don't move further after the final image of the stack

src/openflexure_microscope_server/things/z_stack.py

@@ -71,6 +71,9 @@ class ZStackThing(Thing):
                 logger=logger,
                 metadata_getter=metadata_getter,
             )
+
+            # If the stack isn't complete yet, move
+            if capture_count + 1 < images_to_capture:
                 stage.move_relative(z=stack_dz)
                 time.sleep(0.3)