diff --git a/src/autofocus.py b/src/autofocus.py
index cbee136..89ccfff 100644
--- a/src/autofocus.py
+++ b/src/autofocus.py
@@ -1,7 +1,3 @@
-"""
-Autofocus module - handles focus detection and autofocus routines.
-"""
-
 import time
 import threading
 from vision import calculate_focus_score_sobel
@@ -12,12 +8,12 @@ class AutofocusController:
     
     # Default timing settings
     DEFAULT_SETTINGS = {
-        'sweep_move_time': 2.0,
-        'sweep_settle_time': 0.25,
+        'sweep_move_time': 0.5,
+        'sweep_settle_time': 0.05,
         'sweep_samples': 10,
-        'sweep_steps': 15,
+        'sweep_steps': 30,
         'fine_move_time': 0.15,
-        'fine_settle_time': 0.25,
+        'fine_settle_time': 0.1,
         'fine_samples': 10,
         'fine_max_no_improvement': 5,
     }
diff --git a/src/gui.py b/src/gui.py
index 09d2e35..262253f 100644
--- a/src/gui.py
+++ b/src/gui.py
@@ -1,8 +1,3 @@
-"""
-AutoScope GUI - Pure UI layer.
-Delegates logic to controllers.
-"""
-
 import tkinter as tk
 from tkinter import ttk, scrolledtext
 from PIL import Image, ImageTk
@@ -322,6 +317,7 @@ class AppGUI:
                 score = self.autofocus.get_focus_score()
                 self.focus_score_label.config(text=f"Focus: {score:.1f}")
             
+            frame = self._draw_crosshair(frame)
             frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
             
             h, w = frame.shape[:2]
@@ -338,6 +334,33 @@ class AppGUI:
         except Exception as e:
             print(f"Camera error: {e}")
     
+    def _draw_crosshair(self, frame, color=(0, 0, 255), thickness=1, gap=0, size=40):
+        """
+        Draw a crosshair at the center of the frame.
+        
+        Args:
+            frame: OpenCV image
+            color: BGR color tuple (default green)
+            thickness: Line thickness
+            gap: Gap in center of crosshair
+            size: Length of crosshair arms from center
+        """
+        h, w = frame.shape[:2]
+        cx, cy = w // 2, h // 2
+        
+        # Horizontal lines (left and right of center gap)
+        cv2.line(frame, (cx - size, cy), (cx - gap, cy), color, thickness)
+        cv2.line(frame, (cx + gap, cy), (cx + size, cy), color, thickness)
+        
+        # Vertical lines (above and below center gap)
+        cv2.line(frame, (cx, cy - size), (cx, cy - gap), color, thickness)
+        cv2.line(frame, (cx, cy + gap), (cx, cy + size), color, thickness)
+        
+        # Optional: center dot
+        # cv2.circle(frame, (cx, cy), 2, color, -1)
+        
+        return frame
+
     # === Main Loop ===
     
     def run(self):
diff --git a/src/motion_controller.py b/src/motion_controller.py
index a979699..8e2f919 100644
--- a/src/motion_controller.py
+++ b/src/motion_controller.py
@@ -1,8 +1,3 @@
-"""
-Motion controller - manages axis movement state and commands.
-Abstracts the command protocol from the GUI.
-"""
-
 class MotionController:
     # Command mapping for each axis
     AXIS_COMMANDS = {