Shutter vs Light Meter + SensorArray

With Shutter-Speed you can test the shutter speeds of your analog cameras just with your iPhone. Please note that the full potential of this App is only reached if you use it in combination with the PhotoPlug. The PhotoPlug is an optical sensor which connects to the headphone-jack of your iPhone and enables you to measure the actual amount of light passing through the camera shutter. Please visit www.filmomat.eu for detailed information and for ordering the PhotoPlug. How-To: Point the camera towards a bright light source. Place the PhotoPlug closely behind the camera shutter. Start the measurement and release the shutter. The App automatically analyzes the signal and calculates the shutter speed. All measurement values can be stored into a handy table. Multiple different cameras/lenses can be stored. A correction factor is calculated, which you can use to compensate a faulty shutter speed. For example, if you measure the 1/60s and it turns out to be 1/50s, the App will tell you that the shutter-speed is 1/3 stops too long. This gives rise to a correction factor of -1, indicating that you have to close your aperture by 1/3 f-stop to get a correct exposure. Without PhotoPlug, the App will record the sound of the camera shutter and calculate the shutter speed from that. Please note that this procedure will only give useable results for speeds below 1/30sec. With the PhotoPlug, shutter speeds up to 1/500sec can be measured.

Hardware-Validated Light Metering. Zero Subscriptions. Stop guessing and start measuring with SensorArray—a native, high-performance measurement suite that talks directly to your iPhone’s hardware. Built on international standards (APEX) and professional photographic physics, SensorArray delivers high-fidelity data for analog film, digital cinema, and studio audio. HARDWARE-LINKED SPOT METERING Unlike generic apps, SensorArray utilizes raw 14-bit ISP (Image Signal Processor) metadata. By gating measurements to hardware-ready states, we provide a precision Spot Meter that allows you to sample any pixel in your scene for instant, validated exposure data. THE RECIPROCITY SPECIALIST (Schwarzschild) Master long exposures with precision Schwarzschild Power Law compensation. Film Stocks: Integrated curves for 20+ professional stocks from Kodak, Ilford, and Fujifilm. Automatic math: Meter your scene and get the exact compensated exposure time instantly. THE SUPER SENSOR HUD (Mission Control) A unified interface for critical field data: Ambient Color Balance: Professional Kelvin estimation using McCamy’s Approximation for perfect white balance. SPL Sound Monitor: Calibrated Sound Pressure Level monitoring (30dB–100dB baseline) for ambient noise analysis. NOAA Solar Tracker: Official NOAA General Solar Equations for minute-perfect Golden Hour and Sunrise/Sunset tracking. PROFESSIONAL WORKFLOW SUITE: Digital Film Log: Record Aperture, Shutter, ISO, and Lens metadata for every analog frame. Exposure Equivalence: Built on the international APEX (Additive System of Photographic Exposure) standard. Focus Stacking Assistant: Precision math with a 25% safety overlap for macro composites. Field of View Simulator: Visualize focal lengths from 24mm to 135mm with accurate lens compression. BUILT FOR PROFESSIONALS: 100% Offline: Works in studio basements and remote locations. Privacy-First: No accounts. No tracking. No data collection. Native performance: Built with SwiftUI for ultra-fast response and low battery drain. Own your instruments. Join the "Anti-SaaS" movement and download SensorArray today.