ShutterLab
Hear how your shutter keeps time.
Screen slow mechanical shutter speeds, compare actual and nominal timing, and track consistency before or after camera service—all privately on your iPhone.
Leica M2 · Nominal 1/8
0.129 s
+3.2%+0.05 stops
Honest measurement
Useful where the phone is capable.
Microphone timing is designed for 1 second through 1/60 second. Faster settings are clearly routed to a protected photodiode audio adapter.
Slow shutter timing
Detect opening and closing transients, then report duration, deviation, and stop error.
Repeatability history
Keep camera-labeled measurements locally and export CSV service notes when you choose.
Photodiode guidance
Test faster single-point exposures while staying clear about focal-plane curtain and uniformity limits.